Bug #4510: Float#round(n) is O(n)

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.2p136 (2010-12-25 revision 30365) [i686-linux]

[regularfry (Alex Young)]

=begin
The current implementation of Float#round(n) is O(n). This causes a minor issue with rubyspec, which includes this:

0.8346268.round(-2.0**30).should == 0

which would take about 5 minutes to complete on my machine, during which time the interpreter is locked, doesn't respond to signals, and certainly won't brook any Timeout interruption.

Attached is a patch to replace the problematic part with a call to pow(3).
=end

[naruse (Yui NARUSE)]

• Status changed from Open to Closed
• % Done changed from 0 to 100

=begin
This issue was solved with changeset r31146.
Alex, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

=end