After a few recent complaints from our customers, it became clear that our x264 encoding configuration was way too slow. We had missed some critical optimizations when configuring the library, as well as not using optimal parameters for the encoding itself.

Today we are happy to announce that we have fixed all of these issues:

  • We are now configuring our x264 library to take advantage of CPU-specific (assembler) optimizations
  • Our presets have been updated to use a slightly faster encoding strategy that still produces great quality.
  • Things are now configured to take full advantage of our new 8 core machines

So how much of a difference does this make?

In one especially slow scenario, we are now seeing a 20.5x speed increase over our previous configuration. While your mileage may vary, you should very likely see a similar speedup in the neighborhood of 10x or more.

That being said, we will continue to improve our performance over time, so if you feel something is not fast enough, just let us know and we'll investigate.