crc32c: choose function in static initialization
Before: 4.430 micros/op 225732 ops/sec; 881.8 MB/s (4K per op) After: 4.125 micros/op 242425 ops/sec; 947.0 MB/s (4K per op)
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@ -333,17 +333,14 @@ static bool isSSE42() {
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}
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typedef void (*Function)(uint64_t*, uint8_t const**);
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static Function func = nullptr;
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static inline Function Choose_CRC32() {
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return isSSE42() ? Fast_CRC32 : Slow_CRC32;
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}
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static Function func = Choose_CRC32();
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static inline void CRC32(uint64_t* l, uint8_t const **p) {
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if (func != nullptr) {
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return func(l, p);
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}
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func = Choose_CRC32();
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func(l, p);
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}
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