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mu: some optimizations

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add fast-path for (common) plain-ascii. fix silly static misuse.

should improve indexing with some single-digit percentage.
This commit is contained in:
djcb
2017-10-29 13:34:57 +02:00
parent 3bc53af575
commit 57b5fe6156
2 changed files with 18 additions and 4 deletions
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18
lib/parser/utils.cc
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@ -99,11 +99,27 @@ gx_utf8_flatten (const gchar *str, gssize len)
std::string // gx_utf8_flatten
Mux::utf8_flatten (const std::string& str)
{
// optimization for boring old ascii strings
bool is_ascii = true;
std::string s{str};
for (auto it = s.begin(); it != s.end(); ++it) {
if (*it & 0x80) {
is_ascii = false;
break;
} else
*it = tolower(*it);
}
if (G_LIKELY(is_ascii))
return s;
///////////////////////////////////////////
// seems we need the big guns
char *flat = gx_utf8_flatten (str.c_str(), str.length());
if (!flat)
return {};
std::string s(flat);
s = flat;
g_free (flat);
return s;