dnomd343
/
klotski
mirror of https://github.com/dnomd343/klotski.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

perf: optimize string encoding of ShortCode

master
Dnomd343 2 months ago
parent
3907484eff
commit
ca63237dfd
4 changed files with 96 additions and 77 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 135
      src/core/benchmark/codec.cc
  2. 16
      src/core/short_code/internal/serialize.cc
  3. 20
      src/core/short_code/internal/serialize_chars.h
  4. 2
      src/core/short_code/short_code.h

135
src/core/benchmark/codec.cc
View File

@ -48,59 +48,28 @@ std::vector<uint64_t> common_code_samples(uint64_t num) {
}
// std::vector<uint64_t> select_codes(uint64_t num) {
// auto codes = all_common_codes();
//
// // return {codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411]};
// // std::array<uint64_t, 140> samples = {
// std::vector<uint64_t> samples = {
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
//
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
//
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
//
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// codes[343], codes[666], codes[114514], codes[35324], codes[123454], codes[76453], codes[93411],
// };
//
// return {samples.begin(), samples.begin() + num};
// }
std::vector<uint32_t> short_code_samples(uint64_t num) {
uint32_t part_size = klotski::codec::SHORT_CODE_LIMIT / num;
// uint64_t offset = 0;
uint32_t offset = part_size / 2;
std::vector<uint32_t> result;
for (uint32_t i = 0; i < num; ++i) {
uint32_t index = i * part_size + offset;
// // std::cout << "index = " << index << std::endl;
// uint64_t kk[] {343, 666, 114514, 35324, 123454, 76453, 93411};
// uint64_t index = kk[i % 7];
result.emplace_back(index);
}
return result;
}
std::vector<std::string> str_common_codes(uint64_t num, bool shorten) {
// auto src = select_codes(num);
@ -116,6 +85,20 @@ std::vector<std::string> str_common_codes(uint64_t num, bool shorten) {
return codes;
}
std::vector<std::string> str_short_codes(uint64_t num) {
auto src = short_code_samples(num);
std::vector<std::string> codes;
codes.reserve(src.size());
for (auto x : src) {
codes.emplace_back(klotski::codec::ShortCode::unsafe_create(x).to_string());
}
return codes;
}
static void CommonCodeSerialize(benchmark::State &state) {
// common_code_samples(8);
@ -174,10 +157,48 @@ static void CommonCodeDeserializeShorten(benchmark::State &state) {
}
BENCHMARK(CommonCodeSerialize)->Range(8, 256);
BENCHMARK(CommonCodeDeserialize)->Range(8, 256);
BENCHMARK(CommonCodeSerializeShorten)->Range(8, 256);
BENCHMARK(CommonCodeDeserializeShorten)->Range(8, 256);
static void ShortCodeSerialize(benchmark::State &state) {
std::vector<uint32_t> samples = short_code_samples(state.range(0));
for (auto _ : state) {
for (const auto code : samples) {
volatile auto ret = klotski::codec::ShortCode::string_encode(code);
}
}
state.SetItemsProcessed(state.iterations() * state.range(0));
}
static void ShortCodeDeserialize(benchmark::State &state) {
const auto tmp = str_short_codes(state.range(0));
const std::vector<std::string_view> samples {tmp.begin(), tmp.end()};
for (auto _ : state) {
for (const auto code : samples) {
volatile auto ret = klotski::codec::ShortCode::string_decode(code);
}
}
state.SetItemsProcessed(state.iterations() * state.range(0));
}
// BENCHMARK(CommonCodeSerialize)->Range(8, 256);
// BENCHMARK(CommonCodeDeserialize)->Range(8, 256);
// BENCHMARK(CommonCodeSerializeShorten)->Range(8, 256);
// BENCHMARK(CommonCodeDeserializeShorten)->Range(8, 256);
BENCHMARK(ShortCodeSerialize)->Range(8, 256);
BENCHMARK(ShortCodeDeserialize)->Range(8, 256);
// static void CommonCodeDecode(benchmark::State &state) {
// const auto tmp = str_common_codes(state.range(0));

16
src/core/short_code/internal/serialize.cc
View File

@ -4,28 +4,24 @@
using klotski::codec::ShortCode;
std::string ShortCode::string_encode(uint32_t short_code) {
char result[6];
result[5] = '\0'; // string ending flag
char result[5];
for (int n = 0; n < 5; ++n) {
result[4 - n] = SHORT_CODE_TABLE[short_code & 0b11111];
short_code >>= 5;
}
return result;
return {result, result + 5};
}
std::optional<uint32_t> ShortCode::string_decode(const std::string &short_code) {
std::optional<uint32_t> ShortCode::string_decode(const std::string_view short_code) {
if (short_code.length() != 5) {
return std::nullopt; // invalid string length
}
uint64_t result = 0;
uint32_t result = 0;
for (auto bit : short_code) {
result <<= 5;
if (bit >= 'a' && bit <= 'z') {
bit -= 32; // convert to uppercase
}
if (bit < '1' || bit > 'Z') { // invalid characters
if (bit < '1' || bit > 'z') { // invalid characters
return std::nullopt;
}
result <<= 5;
result += (bit = SHORT_CODE_TABLE_REV[bit - 49]); // table convert
if (bit == -1) { // invalid character
return std::nullopt;

20
src/core/short_code/internal/serialize_chars.h
View File

@ -15,11 +15,9 @@
/// | `S` | `T` | `U` | `V` | `W` | `X` | `Y` | `Z` | ///
/// ------------------------------------------------- ///
#include <cstdint>
namespace klotski::codec {
constexpr int8_t SHORT_CODE_TABLE[32] {
constexpr char SHORT_CODE_TABLE[32] {
'1', '2', '3', '4', '5', '6', '7', '8', '9', // skip `0`
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', // skip `I`
'J', 'K', // skip `L`
@ -27,12 +25,16 @@ constexpr int8_t SHORT_CODE_TABLE[32] {
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
};
constexpr int8_t SHORT_CODE_TABLE_REV[42] {
0, 1, 2, 3, 4, 5, 6, 7, 8, // `1`(49) ~ `9`(57)
-1, -1, -1, -1, -1, -1, -1, // `:`(58) ~ `@`(64)
9, 10, 11, 12, 13, 14, 15, 16, -1, 17, // `A`(65) ~ `J`(74)
18, -1, 19, 20, -1, 21, 22, 23, 24, 25, // `K`(75) ~ `T`(84)
26, 27, 28, 29, 30, 31, // `U`(85) ~ `Z`(90)
constexpr char SHORT_CODE_TABLE_REV[74] {
0, 1, 2, 3, 4, 5, 6, 7, 8, // `1` ~ `9` | [49, 57]
-1, -1, -1, -1, -1, -1, -1, // | [58, 64]
9, 10, 11, 12, 13, 14, 15, 16, -1, 17, // `A` ~ `J` | [65, 74]
18, -1, 19, 20, -1, 21, 22, 23, 24, 25, // `K` ~ `T` | [75, 84]
26, 27, 28, 29, 30, 31, // `U` ~ `Z` | [85, 90]
-1, -1, -1, -1, -1, -1, // | [91, 96]
9, 10, 11, 12, 13, 14, 15, 16, -1, 17, // `a` ~ `j` | [97, 106]
18, -1, 19, 20, -1, 21, 22, 23, 24, 25, // `k` ~ `t` | [107, 116]
26, 27, 28, 29, 30, 31, // `u` ~ `z` | [117, 122]
};
} // namespace klotski::codec

2
src/core/short_code/short_code.h
View File

@ -174,7 +174,7 @@ private:
static std::string string_encode(uint32_t short_code);
/// Deserialize ShortCode from string and return nullopt on error.
static std::optional<uint32_t> string_decode(const std::string &short_code);
static std::optional<uint32_t> string_decode(std::string_view short_code);
// ------------------------------------------------------------------------------------- //
};

Write Preview
Loading…
Cancel
Save