From 2e90ccac0b8e7c2ab788d7a975372cff799a73d4 Mon Sep 17 00:00:00 2001 From: DRC Date: Thu, 22 Mar 2018 15:56:09 -0500 Subject: [PATCH] ChangeLog.md: clarification regarding AVX2 --- ChangeLog.md | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/ChangeLog.md b/ChangeLog.md index eb2a0e6..f12ad38 100644 --- a/ChangeLog.md +++ b/ChangeLog.md @@ -6,11 +6,12 @@ 1. Added AVX2 SIMD implementations of the colorspace conversion, chroma downsampling and upsampling, integer quantization and sample conversion, and slow integer DCT/IDCT algorithms. When using the slow integer DCT/IDCT -algorithms, the compression of RGB images is approximately 13-36% (avg. 22%) -faster (relative to libjpeg-turbo 1.5.x) with 64-bit code and 11-21% (avg. 17%) -faster with 32-bit code, and the decompression of RGB images is approximately -9-35% (avg. 17%) faster with 64-bit code and 7-17% (avg. 12%) faster with -32-bit code. (As tested on a 3 GHz Intel Core i7. Actual mileage may vary.) +algorithms on AVX2-equipped CPUs, the compression of RGB images is +approximately 13-36% (avg. 22%) faster (relative to libjpeg-turbo 1.5.x) with +64-bit code and 11-21% (avg. 17%) faster with 32-bit code, and the +decompression of RGB images is approximately 9-35% (avg. 17%) faster with +64-bit code and 7-17% (avg. 12%) faster with 32-bit code. (As tested on a +3 GHz Intel Core i7. Actual mileage may vary.) 2. Overhauled the build system to use CMake on all platforms, and removed the autotools-based build system. This decision resulted from extensive -- 2.40.0