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Speed up OptMergePass by 1.7x.

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The main speedup comes from swithing from using a SHA1 hash to std::hash<std::string>. There is no need to use an expensive cryptographic hash for fingerprinting in this context.
This commit is contained in:
Rasmus Munk Larsen 2023-10-02 15:57:18 -07:00
parent 7aa26b3a0b
commit bce984fa60
3 changed files with 15 additions and 12 deletions
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6
kernel/rtlil.h
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@ -308,10 +308,14 @@ namespace RTLIL
bool operator!=(const char *rhs) const { return strcmp(c_str(), rhs) != 0; }
char operator[](size_t i) const {
const char *p = c_str();
const char *p = c_str();
#ifndef NDEBUG
for (; i != 0; i--, p++)
log_assert(*p != 0);
return *p;
#else
return *(p + i);
#endif
}
std::string substr(size_t pos = 0, size_t len = std::string::npos) const {