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grpc/test/cpp/microbenchmarks/bm_huffman_decode.cc

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Revert "Revert "[chttp2] Improve huffman decode efficiency (#30479)" (#30961)" (#30962) This reverts commit bfea47093f92130f82cd54f7a33dc1affe75daec.
2 years ago
// Copyright 2022 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cstdint>
#include <random>
#include <benchmark/benchmark.h>
#include "src/core/ext/transport/chttp2/transport/bin_encoder.h"
#include "src/core/ext/transport/chttp2/transport/decode_huff.h"
#include "src/core/lib/slice/slice.h"
#include "test/core/util/test_config.h"
static const std::vector<uint8_t>* kInput = [] {
std::vector<uint8_t> v;
std::mt19937 rd(0);
std::uniform_int_distribution<> dist_ty(0, 100);
std::uniform_int_distribution<> dist_byte(0, 255);
std::uniform_int_distribution<> dist_normal(32, 126);
for (int i = 0; i < 1024 * 1024; i++) {
if (dist_ty(rd) == 1) {
v.push_back(dist_byte(rd));
} else {
v.push_back(dist_normal(rd));
}
}
grpc_core::Slice s = grpc_core::Slice::FromCopiedBuffer(v);
grpc_core::Slice c(grpc_chttp2_huffman_compress(s.c_slice()));
return new std::vector<uint8_t>(c.begin(), c.end());
}();
static void BM_Decode(benchmark::State& state) {
std::vector<uint8_t> output;
auto add = [&output](uint8_t c) { output.push_back(c); };
for (auto _ : state) {
output.clear();
grpc_core::HuffDecoder<decltype(add)>(add, kInput->data(),
kInput->data() + kInput->size())
.Run();
}
}
BENCHMARK(BM_Decode);
// Legacy huffman decoder
static void BM_LegacyDecode(benchmark::State& state) {
/* state table for huffman decoding: given a state, gives an index/16 into
next_sub_tbl. Taking that index and adding the value of the nibble being
considered returns the next state.
generated by gen_hpack_tables.c */
static const uint8_t next_tbl[256] = {
0, 1, 2, 3, 4, 1, 2, 5, 6, 1, 7, 8, 1, 3, 3, 9, 10, 11,
1, 1, 1, 12, 1, 2, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 2, 14, 1, 15, 16, 1, 17, 1, 15, 2, 7, 3, 18, 19, 1,
1, 1, 1, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 15, 2, 2, 7,
21, 1, 22, 1, 1, 1, 1, 1, 1, 1, 1, 15, 2, 2, 2, 2, 2, 2,
23, 24, 25, 1, 1, 1, 1, 2, 2, 2, 26, 3, 3, 27, 10, 28, 1, 1,
1, 1, 1, 1, 2, 3, 29, 10, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 31, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2,
2, 2, 2, 32, 1, 1, 15, 33, 1, 34, 35, 9, 36, 1, 1, 1, 1, 1,
1, 1, 37, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 26, 9,
38, 1, 1, 1, 1, 1, 1, 1, 15, 2, 2, 2, 2, 26, 3, 3, 39, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 7, 3,
3, 3, 40, 2, 41, 1, 1, 1, 42, 43, 1, 1, 44, 1, 1, 1, 1, 15,
2, 2, 2, 2, 2, 2, 3, 3, 3, 45, 46, 1, 1, 2, 2, 2, 35, 3,
3, 18, 47, 2,
};
/* next state, based upon current state and the current nibble: see above.
generated by gen_hpack_tables.c */
static const int16_t next_sub_tbl[48 * 16] = {
1, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217,
218, 2, 6, 10, 13, 14, 15, 16, 17, 2, 6, 10, 13, 14, 15,
16, 17, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7, 11, 24, 3,
7, 11, 24, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8,
4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5,
199, 200, 201, 202, 203, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 9, 133, 134, 135, 136, 137, 138, 139, 140,
141, 142, 143, 144, 145, 146, 147, 3, 7, 11, 24, 3, 7, 11, 24,
4, 8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 12, 132, 4, 8, 4, 8, 4, 8,
4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 18, 19, 20, 21, 4, 8, 4,
8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 22, 23, 91, 25, 26,
27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 3,
7, 11, 24, 3, 7, 11, 24, 0, 0, 0, 0, 0, 41, 42, 43,
2, 6, 10, 13, 14, 15, 16, 17, 3, 7, 11, 24, 3, 7, 11,
24, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0,
44, 45, 2, 6, 10, 13, 14, 15, 16, 17, 46, 47, 48, 49, 50,
51, 52, 57, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 53, 54, 55, 56, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67,
68, 69, 70, 71, 72, 74, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 73, 75, 76, 77, 78, 79, 80, 81, 82,
83, 84, 85, 86, 87, 88, 89, 90, 3, 7, 11, 24, 3, 7, 11,
24, 3, 7, 11, 24, 0, 0, 0, 0, 3, 7, 11, 24, 3, 7,
11, 24, 4, 8, 4, 8, 0, 0, 0, 92, 0, 0, 0, 93, 94,
95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 3, 7, 11, 24,
4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4,
8, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 4,
8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0,
0, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130,
131, 2, 6, 10, 13, 14, 15, 16, 17, 4, 8, 4, 8, 4, 8,
4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 148,
149, 150, 151, 3, 7, 11, 24, 4, 8, 4, 8, 0, 0, 0, 0,
0, 0, 152, 153, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7, 11,
24, 154, 155, 156, 164, 3, 7, 11, 24, 3, 7, 11, 24, 3, 7,
11, 24, 4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 0,
157, 158, 159, 160, 161, 162, 163, 165, 166, 167, 168, 169, 170, 171, 172,
173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187,
188, 189, 190, 191, 192, 193, 194, 195, 196, 4, 8, 4, 8, 4, 8,
4, 8, 4, 8, 4, 8, 4, 8, 197, 198, 4, 8, 4, 8, 4,
8, 4, 8, 0, 0, 0, 0, 0, 0, 219, 220, 3, 7, 11, 24,
4, 8, 4, 8, 4, 8, 0, 0, 221, 222, 223, 224, 3, 7, 11,
24, 3, 7, 11, 24, 4, 8, 4, 8, 4, 8, 225, 228, 4, 8,
4, 8, 4, 8, 0, 0, 0, 0, 0, 0, 0, 0, 226, 227, 229,
230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244,
4, 8, 4, 8, 4, 8, 4, 8, 4, 8, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 245, 246, 247, 248, 249, 250, 251, 252,
253, 254, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 255,
};
/* emission table: indexed like next_tbl, ultimately gives the byte to be
emitted, or -1 for no byte, or 256 for end of stream
generated by gen_hpack_tables.c */
static const uint16_t emit_tbl[256] = {
0, 1, 2, 3, 4, 5, 6, 7, 0, 8, 9, 10, 11, 12, 13,
14, 15, 16, 17, 18, 19, 20, 21, 22, 0, 23, 24, 25, 26, 27,
28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 0, 55, 56,
57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 0,
71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85,
86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100,
101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115,
116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130,
131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145,
146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 0,
160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174,
0, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188,
189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203,
204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218,
219, 220, 221, 0, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232,
233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247,
248,
};
/* generated by gen_hpack_tables.c */
static const int16_t emit_sub_tbl[249 * 16] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 48, 48, 48, 48, 48, 48, 48, 48, 49, 49, 49, 49, 49, 49,
49, 49, 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 97,
97, 97, 97, 48, 48, 49, 49, 50, 50, 97, 97, 99, 99, 101, 101,
105, 105, 111, 111, 48, 49, 50, 97, 99, 101, 105, 111, 115, 116, -1,
-1, -1, -1, -1, -1, 32, 32, 32, 32, 32, 32, 32, 32, 37, 37,
37, 37, 37, 37, 37, 37, 99, 99, 99, 99, 101, 101, 101, 101, 105,
105, 105, 105, 111, 111, 111, 111, 115, 115, 116, 116, 32, 37, 45, 46,
47, 51, 52, 53, 54, 55, 56, 57, 61, 61, 61, 61, 61, 61, 61,
61, 65, 65, 65, 65, 65, 65, 65, 65, 115, 115, 115, 115, 116, 116,
116, 116, 32, 32, 37, 37, 45, 45, 46, 46, 61, 65, 95, 98, 100,
102, 103, 104, 108, 109, 110, 112, 114, 117, -1, -1, 58, 58, 58, 58,
58, 58, 58, 58, 66, 66, 66, 66, 66, 66, 66, 66, 47, 47, 51,
51, 52, 52, 53, 53, 54, 54, 55, 55, 56, 56, 57, 57, 61, 61,
65, 65, 95, 95, 98, 98, 100, 100, 102, 102, 103, 103, 104, 104, 108,
108, 109, 109, 110, 110, 112, 112, 114, 114, 117, 117, 58, 66, 67, 68,
69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83,
84, 85, 86, 87, 89, 106, 107, 113, 118, 119, 120, 121, 122, -1, -1,
-1, -1, 38, 38, 38, 38, 38, 38, 38, 38, 42, 42, 42, 42, 42,
42, 42, 42, 44, 44, 44, 44, 44, 44, 44, 44, 59, 59, 59, 59,
59, 59, 59, 59, 88, 88, 88, 88, 88, 88, 88, 88, 90, 90, 90,
90, 90, 90, 90, 90, 33, 33, 34, 34, 40, 40, 41, 41, 63, 63,
39, 43, 124, -1, -1, -1, 35, 35, 35, 35, 35, 35, 35, 35, 62,
62, 62, 62, 62, 62, 62, 62, 0, 0, 0, 0, 36, 36, 36, 36,
64, 64, 64, 64, 91, 91, 91, 91, 69, 69, 69, 69, 69, 69, 69,
69, 70, 70, 70, 70, 70, 70, 70, 70, 71, 71, 71, 71, 71, 71,
71, 71, 72, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 73, 73,
73, 73, 73, 74, 74, 74, 74, 74, 74, 74, 74, 75, 75, 75, 75,
75, 75, 75, 75, 76, 76, 76, 76, 76, 76, 76, 76, 77, 77, 77,
77, 77, 77, 77, 77, 78, 78, 78, 78, 78, 78, 78, 78, 79, 79,
79, 79, 79, 79, 79, 79, 80, 80, 80, 80, 80, 80, 80, 80, 81,
81, 81, 81, 81, 81, 81, 81, 82, 82, 82, 82, 82, 82, 82, 82,
83, 83, 83, 83, 83, 83, 83, 83, 84, 84, 84, 84, 84, 84, 84,
84, 85, 85, 85, 85, 85, 85, 85, 85, 86, 86, 86, 86, 86, 86,
86, 86, 87, 87, 87, 87, 87, 87, 87, 87, 89, 89, 89, 89, 89,
89, 89, 89, 106, 106, 106, 106, 106, 106, 106, 106, 107, 107, 107, 107,
107, 107, 107, 107, 113, 113, 113, 113, 113, 113, 113, 113, 118, 118, 118,
118, 118, 118, 118, 118, 119, 119, 119, 119, 119, 119, 119, 119, 120, 120,
120, 120, 120, 120, 120, 120, 121, 121, 121, 121, 121, 121, 121, 121, 122,
122, 122, 122, 122, 122, 122, 122, 38, 38, 38, 38, 42, 42, 42, 42,
44, 44, 44, 44, 59, 59, 59, 59, 88, 88, 88, 88, 90, 90, 90,
90, 33, 34, 40, 41, 63, -1, -1, -1, 39, 39, 39, 39, 39, 39,
39, 39, 43, 43, 43, 43, 43, 43, 43, 43, 124, 124, 124, 124, 124,
124, 124, 124, 35, 35, 35, 35, 62, 62, 62, 62, 0, 0, 36, 36,
64, 64, 91, 91, 93, 93, 126, 126, 94, 125, -1, -1, 60, 60, 60,
60, 60, 60, 60, 60, 96, 96, 96, 96, 96, 96, 96, 96, 123, 123,
123, 123, 123, 123, 123, 123, -1, -1, -1, -1, -1, -1, -1, -1, 92,
92, 92, 92, 92, 92, 92, 92, 195, 195, 195, 195, 195, 195, 195, 195,
208, 208, 208, 208, 208, 208, 208, 208, 128, 128, 128, 128, 130, 130, 130,
130, 131, 131, 131, 131, 162, 162, 162, 162, 184, 184, 184, 184, 194, 194,
194, 194, 224, 224, 224, 224, 226, 226, 226, 226, 153, 153, 161, 161, 167,
167, 172, 172, 176, 176, 177, 177, 179, 179, 209, 209, 216, 216, 217, 217,
227, 227, 229, 229, 230, 230, 129, 132, 133, 134, 136, 146, 154, 156, 160,
163, 164, 169, 170, 173, 178, 181, 185, 186, 187, 189, 190, 196, 198, 228,
232, 233, -1, -1, -1, -1, 1, 1, 1, 1, 1, 1, 1, 1, 135,
135, 135, 135, 135, 135, 135, 135, 137, 137, 137, 137, 137, 137, 137, 137,
138, 138, 138, 138, 138, 138, 138, 138, 139, 139, 139, 139, 139, 139, 139,
139, 140, 140, 140, 140, 140, 140, 140, 140, 141, 141, 141, 141, 141, 141,
141, 141, 143, 143, 143, 143, 143, 143, 143, 143, 147, 147, 147, 147, 147,
147, 147, 147, 149, 149, 149, 149, 149, 149, 149, 149, 150, 150, 150, 150,
150, 150, 150, 150, 151, 151, 151, 151, 151, 151, 151, 151, 152, 152, 152,
152, 152, 152, 152, 152, 155, 155, 155, 155, 155, 155, 155, 155, 157, 157,
157, 157, 157, 157, 157, 157, 158, 158, 158, 158, 158, 158, 158, 158, 165,
165, 165, 165, 165, 165, 165, 165, 166, 166, 166, 166, 166, 166, 166, 166,
168, 168, 168, 168, 168, 168, 168, 168, 174, 174, 174, 174, 174, 174, 174,
174, 175, 175, 175, 175, 175, 175, 175, 175, 180, 180, 180, 180, 180, 180,
180, 180, 182, 182, 182, 182, 182, 182, 182, 182, 183, 183, 183, 183, 183,
183, 183, 183, 188, 188, 188, 188, 188, 188, 188, 188, 191, 191, 191, 191,
191, 191, 191, 191, 197, 197, 197, 197, 197, 197, 197, 197, 231, 231, 231,
231, 231, 231, 231, 231, 239, 239, 239, 239, 239, 239, 239, 239, 9, 9,
9, 9, 142, 142, 142, 142, 144, 144, 144, 144, 145, 145, 145, 145, 148,
148, 148, 148, 159, 159, 159, 159, 171, 171, 171, 171, 206, 206, 206, 206,
215, 215, 215, 215, 225, 225, 225, 225, 236, 236, 236, 236, 237, 237, 237,
237, 199, 199, 207, 207, 234, 234, 235, 235, 192, 193, 200, 201, 202, 205,
210, 213, 218, 219, 238, 240, 242, 243, 255, -1, 203, 203, 203, 203, 203,
203, 203, 203, 204, 204, 204, 204, 204, 204, 204, 204, 211, 211, 211, 211,
211, 211, 211, 211, 212, 212, 212, 212, 212, 212, 212, 212, 214, 214, 214,
214, 214, 214, 214, 214, 221, 221, 221, 221, 221, 221, 221, 221, 222, 222,
222, 222, 222, 222, 222, 222, 223, 223, 223, 223, 223, 223, 223, 223, 241,
241, 241, 241, 241, 241, 241, 241, 244, 244, 244, 244, 244, 244, 244, 244,
245, 245, 245, 245, 245, 245, 245, 245, 246, 246, 246, 246, 246, 246, 246,
246, 247, 247, 247, 247, 247, 247, 247, 247, 248, 248, 248, 248, 248, 248,
248, 248, 250, 250, 250, 250, 250, 250, 250, 250, 251, 251, 251, 251, 251,
251, 251, 251, 252, 252, 252, 252, 252, 252, 252, 252, 253, 253, 253, 253,
253, 253, 253, 253, 254, 254, 254, 254, 254, 254, 254, 254, 2, 2, 2,
2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 11, 11, 11, 11, 12,
12, 12, 12, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16,
17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20,
20, 21, 21, 21, 21, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25,
25, 25, 26, 26, 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29,
29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, 127, 127, 127, 127,
220, 220, 220, 220, 249, 249, 249, 249, 10, 13, 22, 256, 93, 93, 93,
93, 126, 126, 126, 126, 94, 94, 125, 125, 60, 96, 123, -1, 92, 195,
208, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 128,
128, 128, 128, 128, 128, 128, 128, 130, 130, 130, 130, 130, 130, 130, 130,
131, 131, 131, 131, 131, 131, 131, 131, 162, 162, 162, 162, 162, 162, 162,
162, 184, 184, 184, 184, 184, 184, 184, 184, 194, 194, 194, 194, 194, 194,
194, 194, 224, 224, 224, 224, 224, 224, 224, 224, 226, 226, 226, 226, 226,
226, 226, 226, 153, 153, 153, 153, 161, 161, 161, 161, 167, 167, 167, 167,
172, 172, 172, 172, 176, 176, 176, 176, 177, 177, 177, 177, 179, 179, 179,
179, 209, 209, 209, 209, 216, 216, 216, 216, 217, 217, 217, 217, 227, 227,
227, 227, 229, 229, 229, 229, 230, 230, 230, 230, 129, 129, 132, 132, 133,
133, 134, 134, 136, 136, 146, 146, 154, 154, 156, 156, 160, 160, 163, 163,
164, 164, 169, 169, 170, 170, 173, 173, 178, 178, 181, 181, 185, 185, 186,
186, 187, 187, 189, 189, 190, 190, 196, 196, 198, 198, 228, 228, 232, 232,
233, 233, 1, 135, 137, 138, 139, 140, 141, 143, 147, 149, 150, 151, 152,
155, 157, 158, 165, 166, 168, 174, 175, 180, 182, 183, 188, 191, 197, 231,
239, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 9, 9, 9,
9, 9, 9, 9, 9, 142, 142, 142, 142, 142, 142, 142, 142, 144, 144,
144, 144, 144, 144, 144, 144, 145, 145, 145, 145, 145, 145, 145, 145, 148,
148, 148, 148, 148, 148, 148, 148, 159, 159, 159, 159, 159, 159, 159, 159,
171, 171, 171, 171, 171, 171, 171, 171, 206, 206, 206, 206, 206, 206, 206,
206, 215, 215, 215, 215, 215, 215, 215, 215, 225, 225, 225, 225, 225, 225,
225, 225, 236, 236, 236, 236, 236, 236, 236, 236, 237, 237, 237, 237, 237,
237, 237, 237, 199, 199, 199, 199, 207, 207, 207, 207, 234, 234, 234, 234,
235, 235, 235, 235, 192, 192, 193, 193, 200, 200, 201, 201, 202, 202, 205,
205, 210, 210, 213, 213, 218, 218, 219, 219, 238, 238, 240, 240, 242, 242,
243, 243, 255, 255, 203, 204, 211, 212, 214, 221, 222, 223, 241, 244, 245,
246, 247, 248, 250, 251, 252, 253, 254, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, 2, 2, 2, 2, 2, 2, 2,
2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4,
4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6,
6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8,
8, 8, 8, 8, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12,
12, 12, 12, 12, 12, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15,
15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17,
17, 17, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 18, 18, 18,
19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20,
20, 21, 21, 21, 21, 21, 21, 21, 21, 23, 23, 23, 23, 23, 23,
23, 23, 24, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25,
25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27,
27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 29, 29, 29,
29, 29, 29, 29, 29, 30, 30, 30, 30, 30, 30, 30, 30, 31, 31,
31, 31, 31, 31, 31, 31, 127, 127, 127, 127, 127, 127, 127, 127, 220,
220, 220, 220, 220, 220, 220, 220, 249, 249, 249, 249, 249, 249, 249, 249,
10, 10, 13, 13, 22, 22, 256, 256, 67, 67, 67, 67, 67, 67, 67,
67, 68, 68, 68, 68, 68, 68, 68, 68, 95, 95, 95, 95, 95, 95,
95, 95, 98, 98, 98, 98, 98, 98, 98, 98, 100, 100, 100, 100, 100,
100, 100, 100, 102, 102, 102, 102, 102, 102, 102, 102, 103, 103, 103, 103,
103, 103, 103, 103, 104, 104, 104, 104, 104, 104, 104, 104, 108, 108, 108,
108, 108, 108, 108, 108, 109, 109, 109, 109, 109, 109, 109, 109, 110, 110,
110, 110, 110, 110, 110, 110, 112, 112, 112, 112, 112, 112, 112, 112, 114,
114, 114, 114, 114, 114, 114, 114, 117, 117, 117, 117, 117, 117, 117, 117,
58, 58, 58, 58, 66, 66, 66, 66, 67, 67, 67, 67, 68, 68, 68,
68, 69, 69, 69, 69, 70, 70, 70, 70, 71, 71, 71, 71, 72, 72,
72, 72, 73, 73, 73, 73, 74, 74, 74, 74, 75, 75, 75, 75, 76,
76, 76, 76, 77, 77, 77, 77, 78, 78, 78, 78, 79, 79, 79, 79,
80, 80, 80, 80, 81, 81, 81, 81, 82, 82, 82, 82, 83, 83, 83,
83, 84, 84, 84, 84, 85, 85, 85, 85, 86, 86, 86, 86, 87, 87,
87, 87, 89, 89, 89, 89, 106, 106, 106, 106, 107, 107, 107, 107, 113,
113, 113, 113, 118, 118, 118, 118, 119, 119, 119, 119, 120, 120, 120, 120,
121, 121, 121, 121, 122, 122, 122, 122, 38, 38, 42, 42, 44, 44, 59,
59, 88, 88, 90, 90, -1, -1, -1, -1, 33, 33, 33, 33, 33, 33,
33, 33, 34, 34, 34, 34, 34, 34, 34, 34, 40, 40, 40, 40, 40,
40, 40, 40, 41, 41, 41, 41, 41, 41, 41, 41, 63, 63, 63, 63,
63, 63, 63, 63, 39, 39, 39, 39, 43, 43, 43, 43, 124, 124, 124,
124, 35, 35, 62, 62, 0, 36, 64, 91, 93, 126, -1, -1, 94, 94,
94, 94, 94, 94, 94, 94, 125, 125, 125, 125, 125, 125, 125, 125, 60,
60, 60, 60, 96, 96, 96, 96, 123, 123, 123, 123, -1, -1, -1, -1,
92, 92, 92, 92, 195, 195, 195, 195, 208, 208, 208, 208, 128, 128, 130,
130, 131, 131, 162, 162, 184, 184, 194, 194, 224, 224, 226, 226, 153, 161,
167, 172, 176, 177, 179, 209, 216, 217, 227, 229, 230, -1, -1, -1, -1,
-1, -1, -1, 129, 129, 129, 129, 129, 129, 129, 129, 132, 132, 132, 132,
132, 132, 132, 132, 133, 133, 133, 133, 133, 133, 133, 133, 134, 134, 134,
134, 134, 134, 134, 134, 136, 136, 136, 136, 136, 136, 136, 136, 146, 146,
146, 146, 146, 146, 146, 146, 154, 154, 154, 154, 154, 154, 154, 154, 156,
156, 156, 156, 156, 156, 156, 156, 160, 160, 160, 160, 160, 160, 160, 160,
163, 163, 163, 163, 163, 163, 163, 163, 164, 164, 164, 164, 164, 164, 164,
164, 169, 169, 169, 169, 169, 169, 169, 169, 170, 170, 170, 170, 170, 170,
170, 170, 173, 173, 173, 173, 173, 173, 173, 173, 178, 178, 178, 178, 178,
178, 178, 178, 181, 181, 181, 181, 181, 181, 181, 181, 185, 185, 185, 185,
185, 185, 185, 185, 186, 186, 186, 186, 186, 186, 186, 186, 187, 187, 187,
187, 187, 187, 187, 187, 189, 189, 189, 189, 189, 189, 189, 189, 190, 190,
190, 190, 190, 190, 190, 190, 196, 196, 196, 196, 196, 196, 196, 196, 198,
198, 198, 198, 198, 198, 198, 198, 228, 228, 228, 228, 228, 228, 228, 228,
232, 232, 232, 232, 232, 232, 232, 232, 233, 233, 233, 233, 233, 233, 233,
233, 1, 1, 1, 1, 135, 135, 135, 135, 137, 137, 137, 137, 138, 138,
138, 138, 139, 139, 139, 139, 140, 140, 140, 140, 141, 141, 141, 141, 143,
143, 143, 143, 147, 147, 147, 147, 149, 149, 149, 149, 150, 150, 150, 150,
151, 151, 151, 151, 152, 152, 152, 152, 155, 155, 155, 155, 157, 157, 157,
157, 158, 158, 158, 158, 165, 165, 165, 165, 166, 166, 166, 166, 168, 168,
168, 168, 174, 174, 174, 174, 175, 175, 175, 175, 180, 180, 180, 180, 182,
182, 182, 182, 183, 183, 183, 183, 188, 188, 188, 188, 191, 191, 191, 191,
197, 197, 197, 197, 231, 231, 231, 231, 239, 239, 239, 239, 9, 9, 142,
142, 144, 144, 145, 145, 148, 148, 159, 159, 171, 171, 206, 206, 215, 215,
225, 225, 236, 236, 237, 237, 199, 207, 234, 235, 192, 192, 192, 192, 192,
192, 192, 192, 193, 193, 193, 193, 193, 193, 193, 193, 200, 200, 200, 200,
200, 200, 200, 200, 201, 201, 201, 201, 201, 201, 201, 201, 202, 202, 202,
202, 202, 202, 202, 202, 205, 205, 205, 205, 205, 205, 205, 205, 210, 210,
210, 210, 210, 210, 210, 210, 213, 213, 213, 213, 213, 213, 213, 213, 218,
218, 218, 218, 218, 218, 218, 218, 219, 219, 219, 219, 219, 219, 219, 219,
238, 238, 238, 238, 238, 238, 238, 238, 240, 240, 240, 240, 240, 240, 240,
240, 242, 242, 242, 242, 242, 242, 242, 242, 243, 243, 243, 243, 243, 243,
243, 243, 255, 255, 255, 255, 255, 255, 255, 255, 203, 203, 203, 203, 204,
204, 204, 204, 211, 211, 211, 211, 212, 212, 212, 212, 214, 214, 214, 214,
221, 221, 221, 221, 222, 222, 222, 222, 223, 223, 223, 223, 241, 241, 241,
241, 244, 244, 244, 244, 245, 245, 245, 245, 246, 246, 246, 246, 247, 247,
247, 247, 248, 248, 248, 248, 250, 250, 250, 250, 251, 251, 251, 251, 252,
252, 252, 252, 253, 253, 253, 253, 254, 254, 254, 254, 2, 2, 3, 3,
4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 11, 11, 12, 12, 14,
14, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21,
23, 23, 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30,
30, 31, 31, 127, 127, 220, 220, 249, 249, -1, -1, 10, 10, 10, 10,
10, 10, 10, 10, 13, 13, 13, 13, 13, 13, 13, 13, 22, 22, 22,
22, 22, 22, 22, 22, 256, 256, 256, 256, 256, 256, 256, 256, 45, 45,
45, 45, 45, 45, 45, 45, 46, 46, 46, 46, 46, 46, 46, 46, 47,
47, 47, 47, 47, 47, 47, 47, 51, 51, 51, 51, 51, 51, 51, 51,
52, 52, 52, 52, 52, 52, 52, 52, 53, 53, 53, 53, 53, 53, 53,
53, 54, 54, 54, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 55,
55, 55, 56, 56, 56, 56, 56, 56, 56, 56, 57, 57, 57, 57, 57,
57, 57, 57, 50, 50, 50, 50, 50, 50, 50, 50, 97, 97, 97, 97,
97, 97, 97, 97, 99, 99, 99, 99, 99, 99, 99, 99, 101, 101, 101,
101, 101, 101, 101, 101, 105, 105, 105, 105, 105, 105, 105, 105, 111, 111,
111, 111, 111, 111, 111, 111, 115, 115, 115, 115, 115, 115, 115, 115, 116,
116, 116, 116, 116, 116, 116, 116, 32, 32, 32, 32, 37, 37, 37, 37,
45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, 51, 51, 51,
51, 52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55,
55, 55, 56, 56, 56, 56, 57, 57, 57, 57, 61, 61, 61, 61, 65,
65, 65, 65, 95, 95, 95, 95, 98, 98, 98, 98, 100, 100, 100, 100,
102, 102, 102, 102, 103, 103, 103, 103, 104, 104, 104, 104, 108, 108, 108,
108, 109, 109, 109, 109, 110, 110, 110, 110, 112, 112, 112, 112, 114, 114,
114, 114, 117, 117, 117, 117, 58, 58, 66, 66, 67, 67, 68, 68, 69,
69, 70, 70, 71, 71, 72, 72, 73, 73, 74, 74, 75, 75, 76, 76,
77, 77, 78, 78, 79, 79, 80, 80, 81, 81, 82, 82, 83, 83, 84,
84, 85, 85, 86, 86, 87, 87, 89, 89, 106, 106, 107, 107, 113, 113,
118, 118, 119, 119, 120, 120, 121, 121, 122, 122, 38, 42, 44, 59, 88,
90, -1, -1, 33, 33, 33, 33, 34, 34, 34, 34, 40, 40, 40, 40,
41, 41, 41, 41, 63, 63, 63, 63, 39, 39, 43, 43, 124, 124, 35,
62, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 36, 36,
36, 36, 36, 36, 36, 36, 64, 64, 64, 64, 64, 64, 64, 64, 91,
91, 91, 91, 91, 91, 91, 91, 93, 93, 93, 93, 93, 93, 93, 93,
126, 126, 126, 126, 126, 126, 126, 126, 94, 94, 94, 94, 125, 125, 125,
125, 60, 60, 96, 96, 123, 123, -1, -1, 92, 92, 195, 195, 208, 208,
128, 130, 131, 162, 184, 194, 224, 226, -1, -1, 153, 153, 153, 153, 153,
153, 153, 153, 161, 161, 161, 161, 161, 161, 161, 161, 167, 167, 167, 167,
167, 167, 167, 167, 172, 172, 172, 172, 172, 172, 172, 172, 176, 176, 176,
176, 176, 176, 176, 176, 177, 177, 177, 177, 177, 177, 177, 177, 179, 179,
179, 179, 179, 179, 179, 179, 209, 209, 209, 209, 209, 209, 209, 209, 216,
216, 216, 216, 216, 216, 216, 216, 217, 217, 217, 217, 217, 217, 217, 217,
227, 227, 227, 227, 227, 227, 227, 227, 229, 229, 229, 229, 229, 229, 229,
229, 230, 230, 230, 230, 230, 230, 230, 230, 129, 129, 129, 129, 132, 132,
132, 132, 133, 133, 133, 133, 134, 134, 134, 134, 136, 136, 136, 136, 146,
146, 146, 146, 154, 154, 154, 154, 156, 156, 156, 156, 160, 160, 160, 160,
163, 163, 163, 163, 164, 164, 164, 164, 169, 169, 169, 169, 170, 170, 170,
170, 173, 173, 173, 173, 178, 178, 178, 178, 181, 181, 181, 181, 185, 185,
185, 185, 186, 186, 186, 186, 187, 187, 187, 187, 189, 189, 189, 189, 190,
190, 190, 190, 196, 196, 196, 196, 198, 198, 198, 198, 228, 228, 228, 228,
232, 232, 232, 232, 233, 233, 233, 233, 1, 1, 135, 135, 137, 137, 138,
138, 139, 139, 140, 140, 141, 141, 143, 143, 147, 147, 149, 149, 150, 150,
151, 151, 152, 152, 155, 155, 157, 157, 158, 158, 165, 165, 166, 166, 168,
168, 174, 174, 175, 175, 180, 180, 182, 182, 183, 183, 188, 188, 191, 191,
197, 197, 231, 231, 239, 239, 9, 142, 144, 145, 148, 159, 171, 206, 215,
225, 236, 237, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 199, 199,
199, 199, 199, 199, 199, 199, 207, 207, 207, 207, 207, 207, 207, 207, 234,
234, 234, 234, 234, 234, 234, 234, 235, 235, 235, 235, 235, 235, 235, 235,
192, 192, 192, 192, 193, 193, 193, 193, 200, 200, 200, 200, 201, 201, 201,
201, 202, 202, 202, 202, 205, 205, 205, 205, 210, 210, 210, 210, 213, 213,
213, 213, 218, 218, 218, 218, 219, 219, 219, 219, 238, 238, 238, 238, 240,
240, 240, 240, 242, 242, 242, 242, 243, 243, 243, 243, 255, 255, 255, 255,
203, 203, 204, 204, 211, 211, 212, 212, 214, 214, 221, 221, 222, 222, 223,
223, 241, 241, 244, 244, 245, 245, 246, 246, 247, 247, 248, 248, 250, 250,
251, 251, 252, 252, 253, 253, 254, 254, 2, 3, 4, 5, 6, 7, 8,
11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 27,
28, 29, 30, 31, 127, 220, 249, -1, 10, 10, 10, 10, 13, 13, 13,
13, 22, 22, 22, 22, 256, 256, 256, 256,
};
std::vector<uint8_t> output;
int16_t decode_state;
// Parse one half byte... we leverage some lookup tables to keep the logic
// here really simple.
auto nibble = [&output, &decode_state](uint8_t nibble) {
int16_t emit = emit_sub_tbl[16 * emit_tbl[decode_state] + nibble];
int16_t next = next_sub_tbl[16 * next_tbl[decode_state] + nibble];
if (emit != -1) {
if (emit >= 0 && emit < 256) {
output.push_back(static_cast<uint8_t>(emit));
} else {
assert(emit == 256);
}
}
decode_state = next;
};
for (auto _ : state) {
output.clear();
decode_state = 0;
for (auto c : *kInput) {
nibble(c >> 4);
nibble(c & 0xf);
}
}
}
BENCHMARK(BM_LegacyDecode);
// Some distros have RunSpecifiedBenchmarks under the benchmark namespace,
// and others do not. This allows us to support both modes.
namespace benchmark {
void RunTheBenchmarksNamespaced() { RunSpecifiedBenchmarks(); }
} // namespace benchmark
int main(int argc, char** argv) {
grpc::testing::TestEnvironment env(&argc, argv);
benchmark::Initialize(&argc, argv);
benchmark::RunTheBenchmarksNamespaced();
return 0;
}