From: mail@...
Date: 2015-01-29T22:09:39+00:00
Subject: [ruby-core:67891] [ruby-trunk - Misc #10800] [PRRF][PATCH] Make math.c twice as faster when passed Bignum

Issue #10800 has been updated by gogo tanaka.

File introduce_num2dbl_with_to_f_func.patch added

    $ cat bench.rb

```ruby
require 'benchmark'

puts Benchmark.measure { 10000000.times { Math.cos(1) } }
puts Benchmark.measure { 10000000.times { Math.cos((1 << 100)) } }
puts Benchmark.measure { 10000000.times { Math.cos(1.0) } }
puts Benchmark.measure { 10000000.times { Math.cos(1/3r) } }
```

## Before
```
  1.370000   0.000000   1.370000 (  1.379540)
  6.700000   0.080000   6.780000 (  7.085635)
  1.380000   0.020000   1.400000 (  1.484075)
  6.460000   0.110000   6.570000 (  7.262271)
```

## After
```
  1.370000   0.000000   1.370000 (  1.391781)
  3.590000   0.020000   3.610000 (  3.650833)
  1.400000   0.010000   1.410000 (  1.416726)
  6.110000   0.040000   6.150000 (  6.208570)
```


----------------------------------------
Misc #10800: [PRRF][PATCH] Make math.c twice as faster when passed Bignum
https://bugs.ruby-lang.org/issues/10800#change-51290

* Author: gogo tanaka
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
This ticket is  continued from [Feature 10785](https://bugs.ruby-lang.org/issues/10785)

My patch last time is only for Fixnum, but now I'd like to do same thing for Bignum without loosing others performance.

And this time I follow [r49434](https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/49434) not to ignore redefinition of Integer#to_f ;)

thanks.

---Files--------------------------------
introduce_num2dbl_with_to_f_func.patch (7.38 KB)


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