nobu 9bc73cd81f array.c: improve operations on small arrays ... [Feature #13884] Reduce number of memory allocations for "and", "or" and "diff" operations on small arrays Very often, arrays are used to filter parameters and to select interesting items from 2 collections and very often these collections are small enough, for example: ```ruby SAFE_COLUMNS = [:id, :title, :created_at] def columns @all_columns & SAFE_COLUMNS end ``` In this patch, I got rid of unnecessary memory allocations for small arrays when "and", "or" and "diff" operations are performed. name | HEAD | PATCH -----------------+------:+------: array_small_and | 0.615 | 0.263 array_small_diff | 0.676 | 0.282 array_small_or | 0.953 | 0.463 name | PATCH -----------------+------: array_small_and | 2.343 array_small_diff | 2.392 array_small_or | 2.056 name | HEAD | PATCH -----------------+------:+------: array_small_and | 1.429 | 1.005 array_small_diff | 1.493 | 0.878 array_small_or | 1.672 | 1.152 name | PATCH -----------------+------: array_small_and | 1.422 array_small_diff | 1.700 array_small_or | 1.452 Author: Dmitry Bochkarev <dimabochkarev@gmail.com> git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60057 b2dd03c8-39d4-4d8f-98ff-823fe69b080e		2017-09-29 07:43:22 +00:00
..
fixtures
pack
shared
allocate_spec.rb
any_spec.rb
append_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
array_spec.rb
assoc_spec.rb
at_spec.rb
bsearch_index_spec.rb
bsearch_spec.rb
clear_spec.rb
clone_spec.rb
collect_spec.rb
combination_spec.rb
compact_spec.rb
comparison_spec.rb
concat_spec.rb
constructor_spec.rb
count_spec.rb
cycle_spec.rb
delete_at_spec.rb
delete_if_spec.rb
delete_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
dig_spec.rb
drop_spec.rb
drop_while_spec.rb
dup_spec.rb
each_index_spec.rb
each_spec.rb
element_reference_spec.rb
element_set_spec.rb
empty_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
eql_spec.rb
equal_value_spec.rb
fetch_spec.rb
fill_spec.rb
find_index_spec.rb
first_spec.rb
flatten_spec.rb
frozen_spec.rb
hash_spec.rb
include_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
index_spec.rb
initialize_spec.rb
insert_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
inspect_spec.rb
intersection_spec.rb	array.c: improve operations on small arrays	2017-09-29 07:43:22 +00:00
join_spec.rb
keep_if_spec.rb
last_spec.rb
length_spec.rb
map_spec.rb
max_spec.rb
min_spec.rb
minus_spec.rb	array.c: improve operations on small arrays	2017-09-29 07:43:22 +00:00
multiply_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
new_spec.rb
partition_spec.rb
permutation_spec.rb
plus_spec.rb
pop_spec.rb
product_spec.rb
push_spec.rb
rassoc_spec.rb
reject_spec.rb
repeated_combination_spec.rb
repeated_permutation_spec.rb
replace_spec.rb
reverse_each_spec.rb
reverse_spec.rb
rindex_spec.rb
rotate_spec.rb	Move spec/rubyspec to spec/ruby for consistency	2017-09-20 20:18:52 +00:00
sample_spec.rb
select_spec.rb
shift_spec.rb
shuffle_spec.rb
size_spec.rb
slice_spec.rb
sort_by_spec.rb
sort_spec.rb
take_spec.rb
take_while_spec.rb
to_a_spec.rb
to_ary_spec.rb
to_h_spec.rb
to_s_spec.rb
transpose_spec.rb
try_convert_spec.rb
union_spec.rb	array.c: improve operations on small arrays	2017-09-29 07:43:22 +00:00
uniq_spec.rb
unshift_spec.rb
values_at_spec.rb
zip_spec.rb