Performance Shootout:

Windows 8.1 Versus Windows 10

by Sandro Villinger on August 26, 2015

One of the first things you see when reserving your free copy of Windows 10 is that it’s “designed for speed”, promising you faster boot times, resume times, and more. But is Windows 10 really that much faster than its direct predecessor? We put it to the test and show you how the new OS fares in multiple scenarios such as boot time, performance while working, smoothness of gaming, and battery life.

In our lab, we started our tests with a rather high-end multimedia notebook – the Asus UX-501.

It’s equipped with a Core i7 (which clocks up to 3.6 GHz), 16 GB of RAM, a rather powerful GeForce 960M GTX and a blazing-fast 128 GB SSD. It’s one of the hotter devices of 2015, and should definitely show if and how much Windows 10 is able to speed things up compared to the pre-installed Windows 8.1.

To get reproduceable and comparable results for Windows 8.1 versus Windows 10, we clean-installed both versions and installed only the latest drivers as well as our speed testing software, PCMark 8. Then we prepared both installs as follows:

• Put devices in a controlled room with 23° celcius and 250 (+/- 50) lux


• Set the power plan to “Balanced”


• Ran all scheduled tasks and automated tasks using the “Rundll32.exe advapi32.dll,ProcessIdleTasks” command


• Installed all updates


• Left all Windows optimization features enabled


• Repeated all benchmark tests three times and then averaged the results

So let’s have a look at the tests we performed before and after the upgrade to Windows 10 Build 10240 (final, including the latest updates as of July 27th, 2015):

1. PC startup time

For “boot time” tests, we used Microsoft’s “Windows ® Performance Toolkit”: These tools are used by software and hardware makers to test the impact of battery life and performance of their products on typical machines.

The difference isn’t huge. But it suggessts Microsoft is working hard to shave off boot time: 9 versus 8.3 seconds isn’t something you feel on such a powerful device. On a slower PC or laptop, it could translate into a far higher benefit.

2. Internet Explorer startup time

During a typical work day, applications get launched and closed all the time. Long load times aren’t just an annoyance to the user, they could even hinder the ability to work or browse the web properly. This is why we used Windows Assessment Toolkit to measure how long it takes to launch an application, in this case Internet Explorer.

Again, a reduction from 0.9 to 0.45 second is something only a few people would notice. Yet it's more evidence how Microsoft is improving performance.

3. Writing, web browsing and video chat performance

The next test involved the benchmarking tool PCMark 8, which uses real-life scenarios such as browsing the web, Office 2013, Adobe Creative Suite, and other tools to recreate typical home and business scenarios. It measures the exact time it takes to complete tasks down to the millisecond:

The numbers you see in the graphs represent the time it took to complete the browsing benchmarks. Unfortunately, in this instance, the results really weren’t that different. A 0.11s difference is completely within margin of error and doesn’t have any real-life effect.

4. Word, Powerpoint and Excel Performance

The next test involved PCMark running automated actions in Word, PowerPoint, and Excel to measure performance, such as converting and calculating a huge Excel file.

We were impressed: In all test iterations, Windows 10 was able to run 8% faster when working with the Office suite.

5. Grand Theft Auto V performance

Thanks to the ubiquity of services like Steam and the increased sales of capable PCs and laptops, gaming applications are not just some of the most popular applications on PCs, but also the most resource-intensive. This is why we used the top game of 2015, Grand Theft Auto V, and its built-in benchmark tool to measure the average FPS (Frames per seconds) for different scenes and scenarios of the game.

Windows 10 actually performed slightly slower, but also within testing tolerance. However, one of the main benefits of Windows 10 is the exclusive implementation of Microsofts graphics platform DirectX 12, which is supposed to speed up games by to 50% – unfortunately, we’re still waiting for compatible titles, so there’s no way to really put this to test at the moment.

6. Adobe Creative Suite performance

While the last couple of tests focused more on consumer activities, such as browsing the web or working with Office, professionals often need higher levels of performance. So we put the systems to the test with Adobe’s Creative Suite.

Again, Windows 10 showed better results, likely due to the improved resource utilization and improved driver support.

7. Battery life while working

Microsoft promised better power management in Windows 10 to save battery life when on the go. We tested this using PCMark 8's work tests (in loop) until the battery ran dry. The result:

In all three test iterations, Windows 10 managed to run 9 minutes longer. Not a massive improvement, but definitely noticeable.

8. Battery life while gaming

Gaming is the number one battery drainer, so it doesn’t come as a surprise that our tests were completed rather quickly. Unfortunately, even with NVIDIAs latest drivers (as of July 28th, 2015), battery life on the 960M while playing GTA V went down rather than up:

That's right. Windows 10 showed a reduction of 13% in our tests. We’re hoping that NVIDIA and Microsoft are working closely on a new driver to fix this issue.

9. Battery life while watching a movie

Given the gaming test, it came as a surprise that our movie tests showed some significant improvements for Windows 10. When watching a 1080p video clip in a loop using Windows Media Player on Windows 8.1, the laptop died after 2 hours and 25 minutes. When using Windows 10, it lasted a whopping 3 hours. Windows 10 probably does something in the background to reduce resource usage during movie playback.

Windows 10 – even in its first release – is a tad faster than Windows 8.1. But it isn't magic. Some areas improved only marginally, though battery life did jump up noticeably for movies.

Also, we tested a clean install of Windows 8.1 versus a clean install of Windows 10. The areas in which operating systems really suffer from performance is the gradual slowdown that occurs over time and with more and more programs or drivers installed. That’s why, in our next blog, we will install 150+ programs on new Windows 10 devices to see how much the new OS handles load – and what we, as AVG, can do about it!

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