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Merge pull request #12025 from NaN-git/strlen

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optimize string concat
This commit is contained in:
Eelco Dolstra 2024-12-09 13:02:16 +01:00 • committed by GitHub
commit 3081e7ce90
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1 changed files with 6 additions and 3 deletions
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9
src/libutil/util.hh
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@ -338,7 +338,9 @@ std::string showBytes(uint64_t bytes);
*/ */
inline std::string operator + (const std::string & s1, std::string_view s2) inline std::string operator + (const std::string & s1, std::string_view s2)
{ {
auto s = s1; std::string s;
s.reserve(s1.size() + s2.size());
s.append(s1);
s.append(s2); s.append(s2);
return s; return s;
} }
@ -351,10 +353,11 @@ inline std::string operator + (std::string && s, std::string_view s2)
inline std::string operator + (std::string_view s1, const char * s2) inline std::string operator + (std::string_view s1, const char * s2)
{ {
auto s2Size = strlen(s2);
std::string s; std::string s;
s.reserve(s1.size() + strlen(s2)); s.reserve(s1.size() + s2Size);
s.append(s1); s.append(s1);
s.append(s2); s.append(s2, s2Size);
return s; return s;
} }