tree 2af8c6f7e6cedd562d0d3d4a3fe47fd932e49429
parent df9245c09af5d0fd3ee0c41101ef69b916fd25fb
author Alessio Bazzica <alessiob@webrtc.org> 1607423165 +0100
committer Commit Bot <commit-bot@chromium.org> 1607441858 +0000

RNN VAD: GRU layer optimized

Using `VectorMath::DotProduct()` in GatedRecurrentLayer to reuse existing
SIMD optimizations. Results:
- When SSE2/AVX2 is avilable, the GRU layer takes 40% of the unoptimized
  code
- The realtime factor for the VAD improved as follows
  - SSE2: from 570x to 630x
  - AVX2: from 610x to 680x

This CL also improved the GRU layer benchmark by (i) benchmarking a GRU
layer havibng the same size of that used in the VAD and (ii) by prefetching
a long input sequence.

Bug: webrtc:10480
Change-Id: I9716b15661e4c6b81592b4cf7c172d90e41b5223
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/195545
Reviewed-by: Per Åhgren <peah@webrtc.org>
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32803}