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Feature #14146
closedImprove performance of creating Hash object
Status:
Closed
Assignee:
-
Target version:
-
Description
When generate Hash object, the heap area of st_table will be always allocated in internally
and seems it take a time.
To improve performance of creating Hash object,
this patch will reduce count of allocating heap areas for st_table by reuse them.
Performance of creating Hash literal -> 1.53 times faster.
Before¶
$ ./miniruby -v -I. -I../benchmark-ips/lib ~/tmp/bench/literal.rb
ruby 2.5.0dev (2017-11-28 hash 60926) [x86_64-darwin17]
Warming up --------------------------------------
Hash literal 51.544k i/100ms
Calculating -------------------------------------
Hash literal 869.132k (± 1.1%) i/s - 4.381M in 5.041574s
After¶
$ ./miniruby -v -I. -I../benchmark-ips/lib ~/tmp/bench/literal.rb
ruby 2.5.0dev (2017-11-28 hash 60926) [x86_64-darwin17]
Warming up --------------------------------------
Hash literal 63.068k i/100ms
Calculating -------------------------------------
Hash literal 1.328M (± 2.3%) i/s - 6.685M in 5.037861s
Test code¶
require 'benchmark/ips'
Benchmark.ips do |x|
x.report "Hash literal" do |loop|
count = 0
while count < loop
hash = {foo: 12, bar: 34, baz: 56}
count += 1
end
end
end
Patch¶
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