CPU Performance: Encoding Tests

With the rise of streaming, vlogs, and video content as a whole, encoding and transcoding tests are becoming ever more important. Not only are more home users and gamers needing to convert video files into something more manageable, for streaming or archival purposes, but the servers that manage the output also manage around data and log files with compression and decompression. Our encoding tasks are focused around these important scenarios, with input from the community for the best implementation of real-world testing.

All of our benchmark results can also be found in our benchmark engine, Bench.

Handbrake 1.1.0: Streaming and Archival Video Transcoding

A popular open source tool, Handbrake is the anything-to-anything video conversion software that a number of people use as a reference point. The danger is always on version numbers and optimization, for example the latest versions of the software can take advantage of AVX-512 and OpenCL to accelerate certain types of transcoding and algorithms. The version we use here is a pure CPU play, with common transcoding variations.

We have split Handbrake up into several tests, using a Logitech C920 1080p60 native webcam recording (essentially a streamer recording), and convert them into two types of streaming formats and one for archival. The output settings used are:

  • 720p60 at 6000 kbps constant bit rate, fast setting, high profile
  • 1080p60 at 3500 kbps constant bit rate, faster setting, main profile
  • 1080p60 HEVC at 3500 kbps variable bit rate, fast setting, main profile

Handbrake 1.1.0 - 720p60 x264 6000 kbps FastHandbrake 1.1.0 - 1080p60 x264 3500 kbps FasterHandbrake 1.1.0 - 1080p60 HEVC 3500 kbps Fast

Our encoding tests require a good balance of cores and frequency, and the 5.0 GHz 14-core hardware easily pulls ahead of the 7940X, and shows that having 28 cores isn't always a good thing.

7-zip v1805: Popular Open-Source Encoding Engine

Out of our compression/decompression tool tests, 7-zip is the most requested and comes with a built-in benchmark. For our test suite, we’ve pulled the latest version of the software and we run the benchmark from the command line, reporting the compression, decompression, and a combined score.

It is noted in this benchmark that the latest multi-die processors have very bi-modal performance between compression and decompression, performing well in one and badly in the other. There are also discussions around how the Windows Scheduler is implementing every thread. As we get more results, it will be interesting to see how this plays out.

Please note, if you plan to share out the Compression graph, please include the Decompression one. Otherwise you’re only presenting half a picture.

7-Zip 1805 Compression7-Zip 1805 Decompression7-Zip 1805 Combined

This is where having 28-cores helps, as the extra frequency can't beat some extra cores.

WinRAR 5.60b3: Archiving Tool

My compression tool of choice is often WinRAR, having been one of the first tools a number of my generation used over two decades ago. The interface has not changed much, although the integration with Windows right click commands is always a plus. It has no in-built test, so we run a compression over a set directory containing over thirty 60-second video files and 2000 small web-based files at a normal compression rate.

WinRAR is variable threaded but also susceptible to caching, so in our test we run it 10 times and take the average of the last five, leaving the test purely for raw CPU compute performance.

WinRAR 5.60b3

WinRAR is one of our variable threaded tests, so here a mix of cores and frequency helps. Interestingly enough, the 9990XE despite with the higher frequency is slightly slower than the 7940X - this might be a function of the test getting too fast, or the fact that the extra power needed to drive up the cores to peak frequency might be causing additional delays with all the small files.

AES Encryption: File Security

A number of platforms, particularly mobile devices, are now offering encryption by default with file systems in order to protect the contents. Windows based devices have these options as well, often applied by BitLocker or third-party software. In our AES encryption test, we used the discontinued TrueCrypt for its built-in benchmark, which tests several encryption algorithms directly in memory.

The data we take for this test is the combined AES encrypt/decrypt performance, measured in gigabytes per second. The software does use AES commands for processors that offer hardware selection, however not AVX-512.

AES Encoding

CPU Performance: Rendering Tests CPU Performance: System Tests
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  • Rοb - Friday, November 1, 2019 - link

    "... These companies not only pay through the nose for the hardware, but also pay experts and specialists to tune those systems for low latency. That means tweaking the memory, overclocking the processor ...".

    Financial trading is often done on the Network Card, see NextPlatform's article "Hypercalers Lead The Way To The Future With SmartNICs" or Wikipedia's "Reducing latency in the order chain".

    When the network card has received a bit of the packet it's starts reviewing which decisions it is able to make based on a partial packet, further narrowing down it's options as more data is received. If it's lucky it can send an order before the packet is completely received - if it can't it calculates if it's worth bailing out or running late with the others.

    The CPUs on HFT machines have fewer CPU cores that can be overclocked since they only need to convert orders to the FPGA. Trading is so fast they implemented 'speed bumps'.:

    "The IEX speed bump—or trading slowdown—is 350 microseconds, which the SEC ruled was within the "immediately visible" parameter.".
  • DillholeMcRib - Monday, November 4, 2019 - link

    I dunno, considering my 3900x is being cooled by a 240mm AIO and at boost barely goes over 105W and yet gets up to a toasty 78C I am pretty sure I don't want to even imagine that damn cooling rig it would take to keep Intel's 200W+ monster cool under boost. I don't have that much need or interest in such a thing, and if anyone else does I sure hope you live in a climate that lets you pull in -10C air into your case.
  • WaltC - Wednesday, November 6, 2019 - link

    Be kind of fun to test this placeholder from Intel with air cooling pitted against air-cooled AMD competition. Yawn...poor Intel, it's going to be a lot of last gasping from them until they put Ryzens and TR's and EPYCs under X-ray to figure out some aspects of manufacturing a modern CPU...;) I'm sure it's all been very instructive for them.
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