Thread: Avisynth+
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Old 3rd March 2019, 09:24   #4556  |  Link
pinterf
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Join Date: Jan 2014
Posts: 2,309
Quote:
Originally Posted by wonkey_monkey View Post
I installed VS2017 alongside VS2013 recently and the resulting compiled filters were significantly (10-20% or so) slower than VS2013. Just thought I'd mention that in passing.
I'd say it cannot be slower and there must be a reason for that. 10-20% is an enourmous difference and cannot be explained by a simple difference in optimization.
I'd look at the generated assembler code.
Then, I think new projects in VS2017 are defaulting to handle spectre mitigation.
There can be a speed difference between MT and MD builds.
Check for possible AVX2-SSE2 transition penalties if any of your code has AVX2.
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