diff options
author | hsbt <hsbt@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-01-03 02:27:50 +0000 |
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committer | hsbt <hsbt@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2015-01-03 02:27:50 +0000 |
commit | 574422733dd11b242ba04c02579710e42fa58a77 (patch) | |
tree | a9c92e59c4b7b8b730f1e789b59e98a173fd1b5d /array.c | |
parent | a84bfcbf0061d30946e4d9692e9d4fa70682aef4 (diff) |
* array.c: Improve performance of Array#shift. use shared instead of
MEMMOVE if with arguments. Patch by @ksss [fix GH-537]
* test/ruby/test_array.rb: ditto.
* benchmark/bm_array_shift.rb: Added benchmark of GH-537 issue.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49114 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'array.c')
-rw-r--r-- | array.c | 13 |
1 files changed, 10 insertions, 3 deletions
@@ -1066,14 +1066,21 @@ rb_ary_shift_m(int argc, VALUE *argv, VALUE ary) n = RARRAY_LEN(result); if (ARY_SHARED_P(ary)) { if (ARY_SHARED_OCCUPIED(ARY_SHARED(ary))) { + setup_occupied_shared: ary_mem_clear(ary, 0, n); } ARY_INCREASE_PTR(ary, n); } else { - RARRAY_PTR_USE(ary, ptr, { - MEMMOVE(ptr, ptr + n, VALUE, RARRAY_LEN(ary)-n); - }); /* WB: no new reference */ + if (RARRAY_LEN(ary) < ARY_DEFAULT_SIZE) { + RARRAY_PTR_USE(ary, ptr, { + MEMMOVE(ptr, ptr+n, VALUE, RARRAY_LEN(ary)-n); + }); /* WB: no new reference */ + } + else { + ary_make_shared(ary); + goto setup_occupied_shared; + } } ARY_INCREASE_LEN(ary, -n); |