Commits on Sep 25, 2022

1. [zstd/enc] Cache align struct for big perf boost …

   ```
   benchstat -delta-test none old2.txt new2.txt
   name                                  old time/op    new time/op     delta
   Encoder_EncodeAllXML-16                 13.3ms ± 0%     13.0ms ± 0%    -2.11%
   Encoder_EncodeAllSimple/fastest-16       229µs ± 0%      227µs ± 0%    -1.08%
   Encoder_EncodeAllSimple/default-16       343µs ± 0%      371µs ± 0%    +8.13%
   Encoder_EncodeAllSimple/better-16        402µs ± 0%      393µs ± 0%    -2.33%
   Encoder_EncodeAllSimple/best-16         6.41ms ± 0%     2.72ms ± 0%   -57.48%  <====
   Encoder_EncodeAllSimple4K/fastest-16    2.70µs ± 0%     2.56µs ± 0%    -5.26%
   Encoder_EncodeAllSimple4K/default-16    33.1µs ± 0%     33.5µs ± 0%    +1.30%
   Encoder_EncodeAllSimple4K/better-16     39.3µs ± 0%     38.8µs ± 0%    -1.12%
   Encoder_EncodeAllSimple4K/best-16        732µs ± 0%      360µs ± 0%   -50.90%   <====
   Encoder_EncodeAllHTML-16                 213µs ± 0%      209µs ± 0%    -2.07%
   Encoder_EncodeAllTwain-16               3.23ms ± 0%     3.23ms ± 0%    -0.04%
   Encoder_EncodeAllPi-16                  1.12ms ± 0%     1.11ms ± 0%    -1.01%
   Random4KEncodeAllFastest-16              988ns ± 0%      976ns ± 0%    -1.31%
   Random10MBEncodeAllFastest-16           2.50ms ± 0%     2.48ms ± 0%    -0.70%
   Random4KEncodeAllDefault-16             4.58µs ± 0%     4.56µs ± 0%    -0.31%
   RandomEncodeAllDefault-16               2.58ms ± 0%     2.52ms ± 0%    -2.20%
   Random10MBEncoderFastest-16             3.61ms ± 0%     3.61ms ± 0%    -0.04%
   RandomEncoderDefault-16                 3.44ms ± 0%     3.44ms ± 0%    +0.03%
   
   name                                  old speed      new speed       delta
   Encoder_EncodeAllXML-16                402MB/s ± 0%    410MB/s ± 0%    +2.16%
   Encoder_EncodeAllSimple/fastest-16     173MB/s ± 0%    175MB/s ± 0%    +1.10%
   Encoder_EncodeAllSimple/default-16     116MB/s ± 0%    107MB/s ± 0%    -7.52%
   Encoder_EncodeAllSimple/better-16     99.0MB/s ± 0%  101.4MB/s ± 0%    +2.38%
   Encoder_EncodeAllSimple/best-16       6.21MB/s ± 0%  14.61MB/s ± 0%  +135.27%  <====
   Encoder_EncodeAllSimple4K/fastest-16  1.52GB/s ± 0%   1.60GB/s ± 0%    +5.56%
   Encoder_EncodeAllSimple4K/default-16   124MB/s ± 0%    122MB/s ± 0%    -1.29%
   Encoder_EncodeAllSimple4K/better-16    104MB/s ± 0%    106MB/s ± 0%    +1.13%
   Encoder_EncodeAllSimple4K/best-16     5.59MB/s ± 0%  11.39MB/s ± 0%  +103.76%  <====
   Encoder_EncodeAllHTML-16               208MB/s ± 0%    213MB/s ± 0%    +2.11%
   Encoder_EncodeAllTwain-16              120MB/s ± 0%    120MB/s ± 0%    +0.04%
   Encoder_EncodeAllPi-16                89.0MB/s ± 0%   89.9MB/s ± 0%    +1.02%
   Random4KEncodeAllFastest-16           4.14GB/s ± 0%   4.20GB/s ± 0%    +1.32%
   Random10MBEncodeAllFastest-16         4.19GB/s ± 0%   4.22GB/s ± 0%    +0.71%
   Random4KEncodeAllDefault-16            895MB/s ± 0%    897MB/s ± 0%    +0.31%
   RandomEncodeAllDefault-16             4.06GB/s ± 0%   4.15GB/s ± 0%    +2.25%
   Random10MBEncoderFastest-16           2.90GB/s ± 0%   2.90GB/s ± 0%    +0.04%
   RandomEncoderDefault-16               3.05GB/s ± 0%   3.05GB/s ± 0%    -0.03%
   ```

   

   nightwolfz committed Sep 25, 2022
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   nightwolfz committed Sep 25, 2022
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