diff options
| author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-03-22 23:34:21 +0000 |
|---|---|---|
| committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-03-22 23:34:21 +0000 |
| commit | ef59670a44f30df7f07dd7a1438a2c27652bcb3c (patch) | |
| tree | 71d0daccc60c19f4d3a43ac3a444b6893cca2757 /benchmark/bm_hash_ident_num.rb | |
| parent | 14c9cf885c2b486fcb5eade23ec4fcdc36ee87f0 (diff) | |
st.c: use power-of-two sizes to avoid slow modulo ops
* st.c (hash_pos): use bitwise AND to avoid slow modulo op
(new_size): power-of-two sizes for hash_pos change
(st_numhash): adjust for common keys due to lack of prime modulo
[Feature #9425]
* hash.c (rb_any_hash): right shift for symbols
* benchmark/bm_hash_aref_miss.rb: added to show improvement
* benchmark/bm_hash_aref_sym_long.rb: ditto
* benchmark/bm_hash_aref_str.rb: ditto
* benchmark/bm_hash_aref_sym.rb: ditto
* benchmark/bm_hash_ident_num.rb: added to prevent regression
* benchmark/bm_hash_ident_obj.rb: ditto
* benchmark/bm_hash_ident_str.rb: ditto
* benchmark/bm_hash_ident_sym.rb: ditto
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45384 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'benchmark/bm_hash_ident_num.rb')
| -rw-r--r-- | benchmark/bm_hash_ident_num.rb | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/benchmark/bm_hash_ident_num.rb b/benchmark/bm_hash_ident_num.rb new file mode 100644 index 0000000000..b226736c6f --- /dev/null +++ b/benchmark/bm_hash_ident_num.rb @@ -0,0 +1,4 @@ +h = {}.compare_by_identity +nums = (1..26).to_a +nums.each { |n| h[n] = n } +200_000.times { nums.each { |n| h[n] } } |