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author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-10-05 17:29:40 +0000 |
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committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-10-05 17:29:40 +0000 |
commit | 9a4f2e44e4178bf23967ccdbedd02ae2ebfc4336 (patch) | |
tree | 1c342bfb34217369462b41a88f119b842a2f45f2 /string.c | |
parent | 9a8254ccecf9d3886cdc728068d27401ba9846ee (diff) | |
download | ruby-9a4f2e44e4178bf23967ccdbedd02ae2ebfc4336.tar.gz |
string.c: optimize rb_str_resurrect
* string.c (rb_str_resurrect): optimize by short circuit to copy
hidden string without checking length, encoding and so on.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52048 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'string.c')
-rw-r--r-- | string.c | 21 |
1 files changed, 20 insertions, 1 deletions
@@ -1250,11 +1250,30 @@ rb_str_dup(VALUE str) VALUE rb_str_resurrect(VALUE str) { + VALUE dup; + VALUE flags = FL_TEST_RAW(str, + RSTRING_NOEMBED | + RSTRING_EMBED_LEN_MASK | + ENC_CODERANGE_MASK | + ENCODING_MASK | + FL_TAINT | FL_FREEZE); + if (RUBY_DTRACE_STRING_CREATE_ENABLED()) { RUBY_DTRACE_STRING_CREATE(RSTRING_LEN(str), rb_sourcefile(), rb_sourceline()); } - return str_duplicate(rb_cString, str); + dup = str_alloc(rb_cString); + MEMCPY(RSTRING(dup)->as.ary, RSTRING(str)->as.ary, VALUE, 3); + if (flags & STR_NOEMBED) { + if (UNLIKELY(!(flags & FL_FREEZE))) { + str = str_new_frozen(rb_cString, str); + FL_SET_RAW(str, flags & FL_TAINT); + } + RB_OBJ_WRITE(dup, &RSTRING(dup)->as.heap.aux.shared, str); + flags |= STR_SHARED; + } + FL_SET_RAW(dup, flags & ~FL_FREEZE); + return dup; } /* |