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New - View All Access Gateway Customer Trials

Netscaler Gateway downloads - Mon, 06/01/2020 - 04:00
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What’s on the Edge?

Theresa Miller - Tue, 01/22/2019 - 06:54

This year many organizations will kick off edge projects. Since this is a hot space, the terms and content you come across may seem contradictory and confusing. What are the terms you’ll need to know to get started with Edge Computing? Defining Edge Computing It’s always good to define terms, so when you’re discussing projects […]

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Office 365 Basics: Office 365 New User and Exchange Online Mailbox

Theresa Miller - Tue, 01/22/2019 - 06:30

While Office 365 has been out for some time, the interface is always changing.  We also need to start somewhere with knowledge and so what you will find is that I will be doing a series of posts called Office 365 Basics.  The goal is to start at the beginning to create a full understanding […]

The post Office 365 Basics: Office 365 New User and Exchange Online Mailbox appeared first on 24x7ITConnection.

Bluetooth Audio Quality & aptX on Windows 10

Helge Klein - Tue, 01/15/2019 - 19:43

Bluetooth is a flexible standard. It defines various profiles that operate on top of the Bluetooth networking protocol stack and implement specific services, such as hands-free communications. Bluetooth devices each support a small subset of profiles, typically only one or two, according to their designated function.

Bluetooth headphones and speakers implement the advanced audio distribution profile (A2DP). The A2DP profile transports encoded audio streams from one device to another. To guarantee compatibility between devices, any device implementing the A2DP profile needs to offer a common codec, SBC. However, A2DP supports additional codecs that may increase audio quality or reduce latency compared to SBC. One of those optional codecs is aptX. In this article, I am looking at aptX benefits and I am describing how to get aptX on Windows 10.

What is aptX?

aptX is an alternative codec for the Bluetooth A2DP protocol. It comes in multiple flavors:

  • aptX
  • aptX LL (low latency)
  • aptX HD
Is aptX better than SBC?

Qualcomm, who acquired the aptX company CSR in 2015, claims that aptX offers “superior audio”. Figuring out whether that is actually true is harder than expected. Let’s break this quality question down into two different aspects: fidelity and latency.

Audio Fidelity

As this overview shows, the technical specifications of the base aptX code are similar to that of SBC. Specifically, the maximum bitrate of 352 kb/s is not much higher than SBC’s 320-345 kb/s (SBC depending on implementation).

The bitrate by itself does not tell us anything about a codec’s fidelity, however. Different codecs can be very different in encoding efficiency, as are H.264 and its successor H.265 for video (the latter only needs about half as many bits for the same visual quality). Fidelity can only be determined by double-blind listening tests. Unfortunately, nobody seems to have performed such listening tests in a scientific, reproducible manner (at least I could not find any information). Please let me know by commenting below if you know of any publications.

Another aspect influencing fidelity is that implementations do not always use a codec’s maximum bitrate. SBC, for example, comes with three quality modes, low (201 kb/s), middle (229 kb/s) and high (328 kb/s). Devices may select lower-quality modes to favor a stable connection over sound quality (example: these Sony headphones).

Audio Latency

When watching a video, you do not want the audio to lag behind. In other words: the audio latency should ideally be small enough to not be noticeable. Unfortunately, that is often not the case.

Bluetooth audio introduces significant latency, the exact amount of which depends on the codec as well as its implementations in the sending and receiving devices. Most Bluetooth headphone reviews do not include latency measurements, with the notable exception of rtings.com. They even have a list with latencies for all the headphones they ever tested. Plain aptX seems to be slightly better than SBC, but only aptX LL seems to be good enough to not be noticeable.

While, however, the number of devices supporting base aptX is steadily growing, support for aptX LL is still extremely rare (see rtings.com or bluetoothcheck.com).

Audio Quality Summary

There do not seem to be any objective comparisons between the aptX variants and SBC. From my experience it should be safe to say the following:

  • SBC offers pretty good fidelity at maximum bitrate.
  • aptX might be slightly better than SBC at maximum bitrate.
  • Both SBC and aptX introduce significant latency in the range of 150-200 ms.
  • aptX LL drastically reduces latency but is only supported by a handful of devices.
aptX on Windows 10 OS Support

If Microsoft wanted to hide this piece of information, they could not be doing a better job. A single page on microsoft.com mentions aptX. Apparently, Windows 10 has supported the aptX codec since the first release (1507). According to this Reddit thread, Windows 10 aptX support does not require any drivers in addition to what is part of the OS. I am mentioning that because numerous forum posts state you need to install special drivers. That does not seem to be true.

As for aptX HD or aptX LL (low latency): those codecs do not seem to be supported. If you would like to have them in Windows – especially aptX LL would be great when watching video – make sure to vote for this item in Feedback Hub: please add aptX Low Latency codec support to the Bluetooth A2DP driver.

For a list of supported Bluetooth versions and profiles see this page.

External USB Adapter

The Avantree Audicast is a flexible Bluetooth transmitter that can be connected to a PC (via USB) or a TV (via optical input or headphone jack). The Audicast has several neat features:

  • Support for aptX LL (low latency) in addition to regular aptX and, of course, SBC
  • LEDs indicate which codec is being used
  • Two receiving headphones can be connected
  • Small and light
  • No additional power source except for USB required
  • All cables are included

Please note that when connected to a PC, the Audicast does not work as a generic Bluetooth adapter (in which case the OS drivers would be used). Instead, it registers as a USB audio device. No drivers are required.

Which Codec and Bitrate are Being Used?

Amazingly, Windows does not provide any tool or API for monitoring the codec used by A2DP. Whether it is SBC, aptX or something different – users are left completely in the dark. To help change that and encourage Microsoft to provide more visibility, please vote for please let users see what Bluetooth A2DP codec is used.

For the sake of completeness I sent several hours capturing and analysing ETW logs as indicated at the following source, but none of the generated logs seemed to indicate the A2DP codec being used.

The post Bluetooth Audio Quality & aptX on Windows 10 appeared first on Helge Klein.

WEM 1811 UPDATE AVAILABLE

Wag the real - Alain Assaf blog - Tue, 01/15/2019 - 17:11
Intro Another season, another WEM version. The version numbering system in now in line with other newly released Citrix products. This version is 1811. You can now download the new version here (requires Platinum licenses and login to Citrix.com). I’ve provided the release notes below. I also have it on good authority that Citrix added […]
Categories: , Citrix, Virtualisation

Cool New Windows 2019 Features

Theresa Miller - Tue, 01/15/2019 - 06:30

After a rocky start in October due to a bad Windows Update that impacted the brand new Windows 2019 platform, Windows 2019 is available and being deployed. With every new Windows version comes a host of new features and functionality. Let’s take a look at some of the coolest new features in Windows 2019, broken […]

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2019 Annual Technology Predictions for the Upcoming Year

Theresa Miller - Tue, 01/08/2019 - 06:30

We are hoping that everyone had a wonderful holiday season which has brought upon us the brand New Year of 2019!  When that happens we all start reflecting on the past year, and what the New Year will bring.  Here is a list of predictions from many great leaders at great companies in the industry […]

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Saving & Restoring Total Commander Tab Sets

Helge Klein - Mon, 01/07/2019 - 17:18

Total Commander’s custom start menu is a great place to quickly launch all kinds of tools and programs that are otherwise hard to get to. However, TC’s start menu is not limited to external tools. It can be used to run internal TC commands, too. In this article, I am using that capability to build a simple solution for saving and restoring sets of Total Commander tabs to and from files.

Why Save and Restore Tab Sets?

The most common use case for multiple tab sets I can think of is people working in different environments or on different projects. Being able to switch the tabs needed at customer A for the tabs needed at customers B, C, or D should be very helpful.

End Result

This is what I am going to build:

The Tabs submenu has entries for loading and saving all tabs from/to a file called %COMPUTERNAME%.tab. This is a simple solution designed as a tab backup. It can easily be extended to a solution that loads and saves multiple different tab sets.

Getting There

Click Start > Change Start Menu… to bring up the dialog that configures Total Commander’s start menu. You might or might not already have entries in your start menu. We are not going to touch them in any way. Instead, we are adding a new section with a Tabs submenu. Instructions:

  1. Navigate to the last of your existing start menu entries.
  2. Add an item with a dash (-) as the title. This creates a dividing horizontal line, separating your existing start menu entries from the new tabs functionality.
  3. Add a submenu with the title Tabs.
  4. In the submenu, add two items.
    • Item 1 title: Load from %COMPUTERNAME%.tab
    • Item 1 command: OPENTABS d:\Data\Total Commander\%COMPUTERNAME%.tab
    • Item 2 title: Save to %COMPUTERNAME%.tab
    • Item 2 command: SAVETABS2L d:\Data\Total Commander\%COMPUTERNAME%.tab

The result should look like this:

Please note:

  • The path used in the commands above must not be enclosed quotes even if it contains spaces.
  • As you can see in the examples, environment variables can be used.
  • The path used above, “d:\Data\Total Commander”, should be adjusted as needed.

That’s it – enjoy!

The post Saving & Restoring Total Commander Tab Sets appeared first on Helge Klein.

New - NetScaler Gateway Plug-in v4.4.0 for Mac OS X

Netscaler Gateway downloads - Tue, 01/01/2019 - 18:30
New downloads are available for Citrix Gateway
Categories: Citrix, Commercial, Downloads

New - NetScaler Gateway Plug-in v4.2.7 for Mac OS X

Netscaler Gateway downloads - Tue, 01/01/2019 - 18:30
New downloads are available for Citrix Gateway
Categories: Citrix, Commercial, Downloads

Citrix User Group XXVII review

Citrix UK User Group - Fri, 12/21/2018 - 15:26

To use the terminology of our CUGC colleagues from the left of “the pond”, this was the UK User Group’s 27th “XL” event (which means we, as always, dedicate a full day to our community sharing, and not just an …

Read more »

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New - Components for NetScaler Gateway 12.0

Netscaler Gateway downloads - Thu, 12/20/2018 - 18:30
New downloads are available for Citrix Gateway
Categories: Citrix, Commercial, Downloads

New - NetScaler Gateway (Maintenance Phase) 12.0 Build 60.9

Netscaler Gateway downloads - Thu, 12/20/2018 - 18:30
New downloads are available for Citrix Gateway
Categories: Citrix, Commercial, Downloads

New - NetScaler Gateway (Maintenance Phase) Plug-ins and Clients for Build 12.0-60.9

Netscaler Gateway downloads - Thu, 12/20/2018 - 18:30
New downloads are available for Citrix Gateway
Categories: Citrix, Commercial, Downloads

Product Releases – Soft is OK but don’t be Squidgy

Rachel Berrys Virtually Visual blog - Mon, 12/17/2018 - 11:33
What is a soft product launch?

Wikipedia has a definition of a soft product launch – here; which says: “A soft launch is the release of a website, hotel, or other Product (business) or service to a limited audience. Soft-launching is a method for gathering data on a product’s usage and acceptance in the marketplace, before making it generally available as a hard launch or grand opening. Companies may choose a soft launch to test the viability of a product or to fine-tune a product before implementing a larger marketing effort.”

Note this says – “limited audience”, “gathering data”, “test the viability”, “fine-tune” etc…. later on elaborated on “a small release being made to a limited group of individuals for beta testing.

Often soft launches take the form of “unsupported features” or “early access programs”. In my experience though I have seen a lot of something which I’m going to call “squidgy launches”.

What is a “squidgy” launch?

A squidgy launch is something where the product is released to the whole audience and market but a lot of the information and marketing around it is held back for a grand announcement at a big corporate event or to tie in with a product or financial announcement. The product surreptitiously appears as a new version on an Akamai or similar download site, available for the mass user base to download. This is typically because there isn’t a high-profile announcement opportunity and/or the product can’t be delayed until there is one because of financial constraints (revenue recognition, customer commitment), other product dependencies (i.e. it _has_ to be released in this release to allow another product to release, there’s no other release vehicle before the big show or because of a commitment to certain customers or sales).

Soft launches can be really useful

As a Product Manager, soft launches can be incredibly useful in many ways:

  • Quality control
  • Testing the viability
  • Getting quality feedback from selected customers
But I’m not a fan of “Squidgy” launches

These are technically full product releases, of the technical bits, but missing a lot of the overall _product_ whether that’s doc, feedback mechanisms and marketing explaining the positioning of the feature/product.

There is now this thing called the INTERNET…. if you haven’t heard of it…. It’s a mechanism by which your customers and partners can communicate directly with each other, cutting you out of the conversation. It also gives all those folk interested in your product a mechanism to broadcast whatever message they think is suitable about your product and a way of filling any “voids”.

Typically, a product will have a large number of independent consultants, partners, bloggers, channel partners and analysts with a significant interest in your product, keen to blog, tweet and communicate about it as soon as possible. These folk often have a strong vested interest in filling any information voids left by a launch to establish themselves as the de-facto expert in the field on _your_ product, to answer their customer inquiries when those customers get wind of a new release and to pick up traffic from google searches to their own company and personal websites and blogs, from searches like “is new product version xxx compatible with product yyy”, “should I upgrade to product version ddd.fff”.

It’s not unusual for a product manager/solution architect to get an email enquiry about something not well-documented/obscure and subsequently see the reply repackaged by an internet expert on their own blog! The illusion is convincing but the only real expertise is a knowledge of who to ask alongside cut-n-paste.  This also means that potential traffic, leads and customer conversations are diverted away from your own website.

Additionally, once the sales, marketing departments have negotiated a “squidgy” launch it can have the effect of refocusing deadlines and efforts on the “real”, “hard” launch. So much of the material is not actually available even internally let alone publicly when the product actually becomes available.

Freelancers: Couriering laptops safely and why separating client hardware from your clean underwear supply is a good thing…

Rachel Berrys Virtually Visual blog - Mon, 12/17/2018 - 11:24

From an article I published on LinkedIn: https://www.linkedin.com/pulse/freelancers-couriering-laptops-safely-why-separating-client-berry/

Sending Laptops by courier. As a freelancer in the UK, I’m increasingly finding clients prefer to issue me with a laptop they have configured, dedicated to just their work, which means I’m always having to triple check if I have the right laptops with me and I’ve got to buy a new laptop bag as the current one has split as a result of optimistically cramming three in it when probably designed for one – oops!

BUT it also means I’m frequently sending/collecting laptops to/from base by motorcycle courier (some don’t trust postal couriers) or FedEx/DHL etc. This process puts some legal obligations on the sender, sometimes me and sometimes the company/organisation and there are a few things to be aware of.

Insurance

Usually for me the client pays and if they are underinsured it is their problem but occasionally it’s my responsibility. Things that I would be aware of and clear up with the client / contractor in writing include:

·       Insurance value; often this is the customs value of the hardware at present day value – this is what you will get if it falls of the back of a lorry; are you underinsured?

·       Insurance liability – unless you specifically arrange it most shipping contracts do not cover indirect loss e.g. if that laptop has your customer database on it and it falls into a competitor’s hands the courier is only on the hook for the hardware costs.

If the client expects you to ship and reclaim, it is probably wise to get written instruction from them on the exact details of the shipping conditions they desire.

Hazardous Labelling

Laptops usually contain Lithium Ion batteries. Although a rare occurrence, they do occasionally spontaneously combust and for the couriers’ staff protection – legally have to be labelled as hazardous and often declared as such in advance on the paperwork (I’ve had some clients not realise that technically a laptop is hazardous). Here’s a frightening CCTV recording from an office in Letchworth, UK where a laptop set fire to a plastics factory.

The best scenario is that you ship hardware around in its original box. Unfortunately, it’s fairly common for the original box to have long since gone to the big recycling centre in the Sky (probably Peterborough). To work around this, I have luckily found a local company who gets through a lot of laptops and when I need a box I just ask them – figuring the hazard labels for a similar laptop should suffice.

The main DHL “Guide to Shipping Dangerous Goods” web pages are a super source of information. The include a summary of shipper’s responsibilities with this key phrase:

·       The shipper is responsible for declaring, packaging and labelling Dangerous Goods. DHL Express will accept Dangerous Goods but with certain restrictions for the different products & services offered and only under certain conditions.

This is where it gets a bit grey for me and I could do with investigating further, often a client will submit the paperwork and my role is putting it in a box and handing it to a courier who turns up at the door. I generally don’t get instructions from the client so it’s a bit vague to me if I’m the shipper or the person filling in the courier forms.

Hazardous Labelling in the UK is changing Dec 2018

In 2017 the regulation on labelling Lithium Ion batteries changed. UK company, Hibiscus PLC have an excellent overview.

Many of the big couriers are very clued up (vs your dodgy bloke in a van like outfit) and luckily I generally only deal with them. DHL have a very good website covering shipping regulation including hazard labelling for Lithium Ion batteries, see here.

The DHL site notes this:

·       As of January 1, 2018 new rules have been introduced for packages containing lithium batteries that are packed and shipped as individual items (loose/bulk), in accordance with Section IA, IB and II of packing instruction 965 or 968.

·       The Class 9 Miscellaneous Dangerous Goods hazard label can still be used, as part of the transitional period, until the end of December 2018 for packages containing lithium batteries prepared in accordance with Section I, IA or IB of the lithium battery packing instructions.

Having investigated – those second hand laptop boxes often seem to have a Class 9 label so using the original box may not suffice. Another one I will have to think about. Thankfully most major couriers have a dangerous goods helpline (often called the Restricted Commodities Group).

There is plenty advice and opportunity to buy the correct hazard labels online. A google on “lithium ion battery warning label” should suffice. Typically laptops fall under the “contained within” regulation UN3481 (FedEx have some good info) .

Basically if in doubt – ask whoever is arranging the courier to specify the exact contents of the shipment and ask the Courier for appropriate labelling.

International Shipping

It gets even more complicated particularly if the insured value doesn’t match the tax man’s opinion and the laptop gets impounded, but a good courier can talk you through the options. Including anything else in the shipment can also cause impoundment, as a dear friend found when he decided to ship a spare pair of underpants and tube of toothpaste to save on hand-luggage… keep your hardware shipment processes separate from your knicker supply is all the advice I can offer! The rules on shipping Lithium batteries are even more stringent if air freight is involved.

VAT on components such as GPUs

Because of the fields I work in occasionally I handle/test GPUs mostly shipped from abroad. The VAT custom rules are pretty strict and if a card ends up in a retail use or as a sales demo enabler the higher rates are payable; if a card is shipped for R&D or marketing purposes e.g. to a blogger who isn’t going to buy just to write about a lower rate applies. This can cause all sorts of confusion and issues if a card ends up being repurposed and nobody is clear who is on the hook for the VAT. As a freelancer, check the paperwork and make sure the designated use is correct and VAT paid (preferably by someone else) and keep yourself away from tax evasion.

Other best practices when sending freelancers laptops

Some clients are quite good at sensible dos/don’t and you may want to consider

·       Stickers with your company logo identify the hardware and likely whose data is on it making your staff/contractors targets for opportunist overheard conversations or thefts. If a corporate laptop gets left on a train it is instantly identifiable to a dishonest person as to whose data is on it.

·       Labelling machines with their network names renders hiding them on untrusted networks a bit pointless

·       Some clients ship lockable laptop bags – some branded / some unbranded (see above on logo stickers), I’m particularly keen on the unbranded lockable rucksacks when travelling on the London tube/subway.

·       I’d estimate that 80% of my clients have moved to locked down encrypted hard disks, so even if the laptop goes walkies it’s not possible to extract data from the hard disk. If the laptop might have sensitive customer or client data on it is probably the best option. Usually on boot you’ll have to type in a password to access the encrypted disk and then the OS will boot and you use your normal windows password to access the OS.

·       There’s a Citrix employee blog with an anecdote of how he left a laptop on a tram in Amsterdam which then fell into competitive hands containing sensitive data, including confidential project details and sales databases. A good read on how human failure can be the weak point in security.

·       Freelancers probably should consider including a section in their contracts regarding laptop failure and return to base/for repair processes. Contractor laptops seem to be less reliable than most, or are the hardware equivalent of a 1987 Mini Metro (I guess like rental cars they’ve borne the brunt of travel and numerous drivers) and there are a lot of questions you need to know the second a client’s hardware fails – how do you carry on working, how do you get a replacement/repair, do you get paid if can’t work etc

 

 

Upgrading Ubuntu 16.04 to 18.04 & PHP 7.0 to 7.2 for WordPress

Helge Klein - Wed, 12/12/2018 - 00:28

This post describes how I upgraded our webserver running WordPress on Apache from Ubuntu 16.04.5 LTS to 18.04.1 LTS. Please see this article for more information on the server’s installation and configuration.

Backup

Before you begin, create a checkpoint (snapshot) in Hyper-V Manager. If anything goes wrong, a checkpoint makes it trivially easy to get back to the last working state.

Installing all Available Updates sudo apt-get update sudo apt-get dist-upgrade sudo apt-get autoremove

Reboot and check Apache’s error log:

sudo shutdown -r now tail /var/log/apache2/error.log Upgrading to Ubuntu 18.04.1 sudo do-release-upgrade

During the upgrade process:

  • When asked whether to install the updated version of /etc/sysctl.conf, select “yes”
  • When asked whether to install the updated version of /etc/apache2/apache2.conf, select “no”
  • When asked whether to install the updated version of /etc/logrotate.d/apache2, select “yes”
  • When asked whether to install the updated version of /etc/ssh/sshd_config, select “keep the local version”
  • When asked whether to install the updated version of security.conf, select “no”
18.04 Upgrade Package Changes Packages no Longer Supported
  • ntp
  • tcpd

You may want to uninstall these packages once the upgrade is finished by running the commands:

sudo apt-get remove ntp sudo apt-get remove tcpd sudo apt-get autoremove Removed Packages
  • curl
  • systemd-shim
  • libapache2-modsecurity
Upgrade PHP Package Name Changes

In the upgrade from Ubuntu 16.04 to 18.04 the PHP version is upgraded from 7.0 to 7.2, which is a good thing. What is not so great is that the names of all the PHP packages change from php7.0-* to php7.2-*. Due to that name change, Apache’s PHP configuration is broken after the upgrade and must be fixed manually.

Additionally, the upgrade routine is not clever enough to upgrade any manually installed PHP packages. The 7.0 versions of the following packages are uninstalled instead of replacing them with their 7.2 versions:

  • php7.0-curl
  • php7.0-gd
  • php7.0-json
  • php7.0-mbstring
  • php7.0-mcrypt
  • php7.0-mysql
  • php7.0-opcache
  • php7.0-tidy
  • php7.0-xml
  • php7.0-xmlrpc
  • php7.0-cli
  • php7.0-common
  • php7.0-readline
Migrating from PHP 7.0 to PHP 7.2 Apache Configuration

Enable the PHP 7.2 module:

sudo a2enmod php7.2 sudo service apache2 restart Installing Missing PHP 7.2 Modules sudo apt-get install php7.2-mysql php7.2-curl php7.2-gd php7.2-json php7.2-mbstring php7.2-opcache php7.2-tidy php7.2-xml php7.2-xmlrpc sudo apt-get autoremove sudo service apache2 restart

Note: mcrypt is not available any more with PHP 7.2.

PHP 7.2 Hardening and Optimization

Edit /etc/php/7.2/apache2/php.ini:

Add the following to disable_functions: exec,system,shell_exec,passthrough

Configure PHP’s opcache by setting:

opcache.enable=1 opcache.memory_consumption=256 opcache.interned_strings_buffer=10 opcache.max_accelerated_files=10000

Restart Apache:

sudo service apache2 restart Fixing PHP Errors PHP Warning “Illegal string offset”

Cause: a string variable is used like an array, e.g.:

$var[index] = "value";

Fix it by adding an array check:

// DATE PHP 7.2 compat: added check if $var actually is an array if (is_array ($var)) $var[index] = "value"; Removing Obsolete PHP Directories

Clean up remainders from earlier migrations:

sudo rm -r /etc/php5 sudo rm -r /etc/php/7.0 Adjusting the Logrotate Configuration

Edit /etc/logrotate.d/apache2 so that it says:

rotate 30 dateext Re-enabling the mod_pagespeed Repository

This was disabled during the upgrade.

sudo rm /etc/apt/sources.list.d/mod-pagespeed.list sudo mv /etc/apt/sources.list.d/mod-pagespeed.list.distUpgrade /etc/apt/sources.list.d/mod-pagespeed.list Checking for errors

Check Apache’s error log:

tail /var/log/apache2/error.log

The post Upgrading Ubuntu 16.04 to 18.04 & PHP 7.0 to 7.2 for WordPress appeared first on Helge Klein.

Microsoft Ends 2018 With Failed Windows Update

Theresa Miller - Tue, 12/11/2018 - 06:30

Many home users of Microsoft products almost take for granted their Windows Update will operate correctly.  For those of you keeping score, Microsoft pulled the Windows Update from October 2018 because it was unexpectedly deleting user files.  To finish the year with a bang, Microsoft pulled yet another failed Windows Update in December of 2018 to end […]

The post Microsoft Ends 2018 With Failed Windows Update appeared first on 24x7ITConnection.

PowerShell Script: Test Chrome, Firefox & IE Browser Performance

Helge Klein - Tue, 12/04/2018 - 17:58
Contents

There is more than one way to test the performance of web browsers like Chrome, Firefox, or IE, but regardless of how you do it, you need a consistent workload that makes the browsers comparable. Unless you are testing with synthetic benchmarks (which come with a plethora of problems of their own) you need a way to automate browsers opening tabs and loading URLs. This article presents a simple solution to do just that.

Purpose of This Browser Test Script

I have written about various aspects of browser performance and privacy before. For those earlier articles, I manually ran the browsers through a series of tests. This quickly proved to be tedious and error-prone. Obviously, automation is the name of the game.

For this year’s session Web App Performance in a Virtual World which I presented at Citrix Technology Exchange and at community meetups I went ahead and finally automated a large part of the test process, and it paid off immediately. I was able to test more configurations in less time with increased accuracy.

Testing is not enough, of course. You need to measure, too. For that, I have been using our uberAgent user experience and application performance monitoring product. uberAgent measures browser page load duration for all major browsers (which was important here) in addition to providing detailed application usage and performance insights for all installed and running applications – Win32, UWP, Java, App-V, etc.

Tweet source

What the Browser Test Script Does

It is really quite simple. I needed a script that would do the following – mind you, for any number of installed browsers and for a list of URLs supplied through a parameter file:

  • Start the browser
  • Open each URL in a new browser tab, waiting 30 s in between
  • Close the browser (gracefully)
  • Repeat the above three times per browser
Techniques Used in the Browser Test Script

I only rarely use PowerShell, my main development work is in C++. Nevertheless, you might find some of the following interesting.

Starting Applications With Their Name Only

Windows has a functionality for starting applications by name without requiring them to be part of the PATH environment variable. This is as useful as it is rarely known. I explained the mechanics in my article How the App Paths Registry Key Makes Windows Both Faster and Safer. The thing to note in this context is that App Paths entries can be leveraged from PowerShell with the Start-Process cmdlet. I used it in the script to start browsers by providing simple names like “chrome” or “firefox”.

Closing an Application’s Window Gracefully

When you start an application with the Start-Process cmdlet, it returns a process object. This object has an extremely useful method, CloseMainWindow(). It is equivalent to clicking on the “X” in the window’s upper right corner.

The Browser Test Script # # One time setup: # # - Open all sites on the list in all browsers # - Log on the test user UXMetricsGuyA (where applicable) # - Switch the browser window to full screen # - Config per site: # - Accept cookie popups # - Do not accept a site's notifications # - Enable "stay signed in" where applicable # - Config per browser: # - Configure browser startup to not open previous tabs # - Configure start page: "about:blank" # - Do not save passwords in the browser # - Disable browser dialogs: # - asking about not being the default # - asking if you want to close all tabs # # Before each test run: # # - Empty each browser's cache # - Do not delete cookies # - Close all browsers # - Restart the machine # - Log on as test user test01 # - Start a PowerShell console # - Wait five minutes # - Start this script # # # Global variables # # How long to wait between open site commands $waitBetweenSitesS = 30; # How long to wait after a browser's last site before closing its window $waitBeforeBrowserClose = 30; # How long to wait between browsers $waitBetweenBrowsers = 30; # Name of the file containing the sites to open $siteUrlFile = ".\URLs.txt"; # Number of iterations $iterations = 3; # Browsers to start $browsers = @("chrome", "firefox", "iexplore") # # Start of the script # # Read the sites file $sites = Get-Content $siteUrlFile; # Iterations for ($i = 1; $i -le $iterations; $i++) { Write-Host "Iteration: " $i # Browsers foreach ($browser in $browsers) { # Sites $siteCount = 0; foreach ($site in $sites) { $siteCount++; if ($siteCount -eq 1) { if ($browser -eq "chrome" -or $browser -eq "firefox") { # Start the browser with an empty tab because the first page load is currently not captured by uberAgent $process = Start-Process -PassThru $browser "about:blank" } else { # Start the browser with the first site $process = Start-Process -PassThru $browser $site } # Store the browser's main process (the first one started) $browserProcess = $process; # Wait for the window to open while ($process.MainWindowHandle -eq 0) { Start-Sleep 1 } if ($browser -eq "chrome" -or $browser -eq "firefox") { # Open the first site in a new tab Start-Process $browser $site } } elseif ($browser -eq "iexplore") { # Additional IE tabs need to be opened differently, or new windows will be created instead $navOpenInNewTab = 0x800; # Get running Internet Explorer instances $app = New-Object -ComObject shell.application; # Grab the last opened tab $ie = $app.Windows() | Select-Object -Last 1; # Open the site in a new tab $ie.navigate($site, $navOpenInNewTab); # Release the COM objects Remove-Variable ie; Remove-Variable app; } else { # Addition tabs in Chrome/Firefox Start-Process $browser $site } Start-Sleep $waitBetweenSitesS; } Start-Sleep $waitBeforeBrowserClose; # Close the browser $browserProcess.CloseMainWindow(); $browserProcess = $null; Start-Sleep $waitBetweenBrowsers; } } The Script’s URL Input File

The URL input file I used with the script in my 2018 tests looked like this:

https://mail.google.com/mail/u/0/#inbox https://docs.google.com/document/d/1hOc4bdEQ1-KJ5wOsiCt4kVQB-xaHuciQY6Y4X_I7dYA/edit https://www.google.com/maps/ https://twitter.com/ https://onedrive.live.com/edit.aspx?cid=740de493111072ca&page=view&resid=740DE493111072CA!108&parId=740DE493111072CA!106&app=PowerPoint https://outlook.live.com/mail/inbox https://www.dropbox.com/h https://www.nytimes.com/ https://www.nbcnews.com/ https://edition.cnn.com/

The post PowerShell Script: Test Chrome, Firefox & IE Browser Performance appeared first on Helge Klein.

Gartner I&O Conference 2018: What’s next for IT ops?

Theresa Miller - Tue, 12/04/2018 - 15:18

This week I’m attending the Gartner I&O Conference – or the Gartner IT Infrastructure, Operations & Cloud Strategies Conference 2018. It used to be called the Gartner Datacenter conference, but times have changed. Now the scope of what we must architect has expanded. Is a datacenter just what you manage on premises? Is it your public cloud […]

The post Gartner I&O Conference 2018: What’s next for IT ops? appeared first on 24x7ITConnection.

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