diff options
| -rw-r--r-- | apt-pkg/pkgcache.cc | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/apt-pkg/pkgcache.cc b/apt-pkg/pkgcache.cc index 458860b0a..f7f3537aa 100644 --- a/apt-pkg/pkgcache.cc +++ b/apt-pkg/pkgcache.cc @@ -209,8 +209,22 @@ bool pkgCache::ReMap(bool const &Errorchecks) map_id_t pkgCache::sHash(StringView Str) const { uint32_t Hash = 5381; - for (auto I = Str.begin(); I != Str.end(); ++I) - Hash = 33 * Hash + tolower_ascii_unsafe(*I); + auto I = Str.begin(); + auto End = Str.end(); + for (; I + 7 < End; I += 8) + { + Hash = (33u * 33u * 33u * 33u * 33u * 33u * 33u * 33u * Hash + + 33u * 33u * 33u * 33u * 33u * 33u * 33u * tolower_ascii_unsafe(I[0]) + + 33u * 33u * 33u * 33u * 33u * 33u * tolower_ascii_unsafe(I[1]) + + 33u * 33u * 33u * 33u * 33u * tolower_ascii_unsafe(I[2]) + + 33u * 33u * 33u * 33u * tolower_ascii_unsafe(I[3]) + + 33u * 33u * 33u * tolower_ascii_unsafe(I[4]) + + 33u * 33u * tolower_ascii_unsafe(I[5]) + + 33u * tolower_ascii_unsafe(I[6]) + + tolower_ascii_unsafe(I[7])); + } + for (; I != End; ++I) + Hash = 33u * Hash + tolower_ascii_unsafe(*I); return Hash % HeaderP->GetHashTableSize(); } uint32_t pkgCache::CacheHash() |