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No sync on ASCII/US_ASCCII/UTF-8

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rb_enc_from_index(index) doesn't need locking if index specify
ASCII/US_ASCCII/UTF-8.
rb_enc_from_index() is called frequently so it has impact.

                               user     system      total        real
r_parallel/miniruby       174  0.000209   0.000000   5.559872 (  1.811501)
r_parallel/master_mini    175  0.000238   0.000000  12.664707 (  3.523641)

(repeat x1000 `s.split(/,/)` where s = '0,,' * 1000)
This commit is contained in:
Koichi Sasada 2020-12-17 01:56:30 +09:00
parent c58142134c
commit 2a3324fcd2
Notes: git 2020-12-17 03:44:47 +09:00
1 changed files with 10 additions and 3 deletions
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13
encoding.c
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@ -418,9 +418,16 @@ rb_encoding *
rb_enc_from_index(int index)
{
rb_encoding *enc;
GLOBAL_ENC_TABLE_EVAL(enc_table,
enc = enc_from_index(enc_table, index));
return enc;
switch (index) {
case ENCINDEX_ASCII: return global_enc_ascii;
case ENCINDEX_UTF_8: return global_enc_utf_8;
case ENCINDEX_US_ASCII: return global_enc_us_ascii;
default:
GLOBAL_ENC_TABLE_EVAL(enc_table,
enc = enc_from_index(enc_table, index));
return enc;
}
}
int