Carl Mastrangelo deea51e609 Disable Huffman encoding for small headers (#9260) ... Motivation: Huffman coding saves only a little space, but has a huge CPU cost Modification: Disable huff coding for headers smaller than 512 bytes. Also, add a configurable limit to the encoder. Result: Faster HPACK BEFORE: ``` Benchmark (duplicates) (limitToAscii) (sensitive) (size) Mode Cnt Score Error Units HpackEncoderBenchmark.encode true true true SMALL avgt 10 2572.595 ± 16.184 ns/op HpackEncoderBenchmark.encode true true true MEDIUM avgt 10 19580.815 ± 397.780 ns/op HpackEncoderBenchmark.encode true true true LARGE avgt 10 379456.381 ± 2059.919 ns/op HpackEncoderBenchmark.encode true true false SMALL avgt 10 730.579 ± 8.116 ns/op HpackEncoderBenchmark.encode true true false MEDIUM avgt 10 2087.590 ± 84.644 ns/op HpackEncoderBenchmark.encode true true false LARGE avgt 10 11725.228 ± 89.298 ns/op HpackEncoderBenchmark.encode true false true SMALL avgt 10 555.971 ± 5.120 ns/op HpackEncoderBenchmark.encode true false true MEDIUM avgt 10 2831.874 ± 41.801 ns/op HpackEncoderBenchmark.encode true false true LARGE avgt 10 36054.025 ± 179.504 ns/op HpackEncoderBenchmark.encode true false false SMALL avgt 10 340.337 ± 3.313 ns/op HpackEncoderBenchmark.encode true false false MEDIUM avgt 10 1006.817 ± 8.942 ns/op HpackEncoderBenchmark.encode true false false LARGE avgt 10 8784.168 ± 164.014 ns/op HpackEncoderBenchmark.encode false true true SMALL avgt 10 2561.934 ± 27.056 ns/op HpackEncoderBenchmark.encode false true true MEDIUM avgt 10 22061.105 ± 154.533 ns/op HpackEncoderBenchmark.encode false true true LARGE avgt 10 435744.897 ± 8853.388 ns/op HpackEncoderBenchmark.encode false true false SMALL avgt 10 2737.683 ± 47.142 ns/op HpackEncoderBenchmark.encode false true false MEDIUM avgt 10 22385.146 ± 98.430 ns/op HpackEncoderBenchmark.encode false true false LARGE avgt 10 408159.698 ± 12044.931 ns/op HpackEncoderBenchmark.encode false false true SMALL avgt 10 544.213 ± 3.279 ns/op HpackEncoderBenchmark.encode false false true MEDIUM avgt 10 2908.978 ± 31.026 ns/op HpackEncoderBenchmark.encode false false true LARGE avgt 10 36471.262 ± 1044.010 ns/op HpackEncoderBenchmark.encode false false false SMALL avgt 10 609.305 ± 4.371 ns/op HpackEncoderBenchmark.encode false false false MEDIUM avgt 10 3223.946 ± 23.505 ns/op HpackEncoderBenchmark.encode false false false LARGE avgt 10 39975.152 ± 655.196 ns/op ``` AFTER: ``` NEW AFTER Benchmark (duplicates) (limitToAscii) (sensitive) (size) Mode Cnt Score Error Units HpackEncoderBenchmark.encode true true true SMALL avgt 5 379.473 ± 133.815 ns/op HpackEncoderBenchmark.encode true true true MEDIUM avgt 5 1118.772 ± 89.258 ns/op HpackEncoderBenchmark.encode true true true LARGE avgt 5 5366.828 ± 89.746 ns/op HpackEncoderBenchmark.encode true true false SMALL avgt 5 284.401 ± 2.088 ns/op HpackEncoderBenchmark.encode true true false MEDIUM avgt 5 922.805 ± 10.796 ns/op HpackEncoderBenchmark.encode true true false LARGE avgt 5 8727.831 ± 462.138 ns/op HpackEncoderBenchmark.encode true false true SMALL avgt 5 337.093 ± 22.585 ns/op HpackEncoderBenchmark.encode true false true MEDIUM avgt 5 693.689 ± 16.351 ns/op HpackEncoderBenchmark.encode true false true LARGE avgt 5 5616.786 ± 98.647 ns/op HpackEncoderBenchmark.encode true false false SMALL avgt 5 286.708 ± 13.765 ns/op HpackEncoderBenchmark.encode true false false MEDIUM avgt 5 906.279 ± 32.338 ns/op HpackEncoderBenchmark.encode true false false LARGE avgt 5 8304.736 ± 128.584 ns/op HpackEncoderBenchmark.encode false true true SMALL avgt 5 351.381 ± 15.547 ns/op HpackEncoderBenchmark.encode false true true MEDIUM avgt 5 1188.166 ± 7.023 ns/op HpackEncoderBenchmark.encode false true true LARGE avgt 5 6876.009 ± 48.117 ns/op HpackEncoderBenchmark.encode false true false SMALL avgt 5 434.759 ± 8.619 ns/op HpackEncoderBenchmark.encode false true false MEDIUM avgt 5 954.588 ± 58.514 ns/op HpackEncoderBenchmark.encode false true false LARGE avgt 5 8534.017 ± 552.597 ns/op HpackEncoderBenchmark.encode false false true SMALL avgt 5 223.713 ± 4.823 ns/op HpackEncoderBenchmark.encode false false true MEDIUM avgt 5 1181.538 ± 11.851 ns/op HpackEncoderBenchmark.encode false false true LARGE avgt 5 6670.830 ± 267.927 ns/op HpackEncoderBenchmark.encode false false false SMALL avgt 5 424.609 ± 27.477 ns/op HpackEncoderBenchmark.encode false false false MEDIUM avgt 5 1003.578 ± 53.991 ns/op HpackEncoderBenchmark.encode false false false LARGE avgt 5 8428.932 ± 102.838 ns/op ```		2019-07-01 21:00:20 +02:00
..
src	Disable Huffman encoding for small headers (#9260)	2019-07-01 21:00:20 +02:00
pom.xml	[maven-release-plugin] prepare for next development iteration	2019-06-28 05:57:21 +00:00