зеркало из https://github.com/github/ruby.git
Improve Time#<=> performance
* time.c (wcmp): use internal cmp() function for comparing internal Fixnum value in Time objects. On 64-bit machine, Time object might have Fixnum object internally by default and cmp() can compare the Fixnum objects directly. Time#<=> will be faster around 60% on 64-bit machine. * time.c (cmp): add optimized path for comparing internal Bignum value by using rb_big_cmp() API. On 32-bit machine, Time object might have Bignum object internally by default. Time#<=> will be faster around 50% on 32-bit machine. [ruby-dev:50034] [Bug #13354] [Fix GH-1546] ### Before user system total real Fixnum 1.410000 0.000000 1.410000 ( 1.407848) Bignum 1.550000 0.000000 1.550000 ( 1.549145) ### After user system total real Fixnum 0.880000 0.000000 0.880000 ( 0.886662) Bignum 1.050000 0.000000 1.050000 ( 1.047994) ### Test code require 'benchmark' Benchmark.bmbm do |x| x.report "Fixnum" do t1 = Time.now t2 = Time.now 10000000.times do t1 <=> t2 end end x.report "Bignum" do t1 = Time.at(2 ** 64) t2 = Time.at(2 ** 64 + 1) 10000000.times do t1 <=> t2 end end end git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58828 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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3
time.c
3
time.c
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@ -64,6 +64,7 @@ cmp(VALUE x, VALUE y)
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return 1;
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return 0;
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}
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if (RB_TYPE_P(x, T_BIGNUM)) return FIX2INT(rb_big_cmp(x, y));
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return rb_cmpint(rb_funcall(x, idCmp, 1, y), x, y);
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}
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@ -332,7 +333,7 @@ wcmp(wideval_t wx, wideval_t wy)
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#endif
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x = w2v(wx);
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y = w2v(wy);
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return rb_cmpint(rb_funcall(x, idCmp, 1, y), x, y);
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return cmp(x, y);
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}
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#define wne(x,y) (!weq((x),(y)))
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