Issue #9221 has been updated by Usaku NAKAMURA.

Backport changed from 1.9.3: REQUIRED, 2.0.0: DONE to 1.9.3: DONE, 2.0.0: DONE

backported into ruby_1_9_3 at r44746.

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Bug #9221: Time.parse performance becomes exponentially worse as string length grows
https://bugs.ruby-lang.org/issues/9221#change-44686

* Author: Michael Pelz-Sherman
* Status: Closed
* Priority: Normal
* Assignee: tadayoshi funaba
* Category: core
* Target version: 2.1.0
* ruby -v: ruby-2.0.0-p247
* Backport: 1.9.3: DONE, 2.0.0: DONE
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See attached script. Output:

parsing 12:00 PM fffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.010443
parsing 12:00 PM ffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.017739
parsing 12:00 PM fffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.028127
parsing 12:00 PM ffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.049885
parsing 12:00 PM fffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.071379
parsing 12:00 PM ffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.112612
parsing 12:00 PM fffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.184517
parsing 12:00 PM ffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.293784
parsing 12:00 PM fffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.476253
parsing 12:00 PM ffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 0.786087
parsing 12:00 PM fffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 1.256976
parsing 12:00 PM ffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 2.019426
parsing 12:00 PM fffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 3.300646
parsing 12:00 PM ffffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 5.37757
parsing 12:00 PM fffffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 8.763601
parsing 12:00 PM ffffffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 14.165842
parsing 12:00 PM fffffffffffffffffffffffffffffffff
2013-12-05 12:00:00 -0500
elapsed: 23.888907
...


---Files--------------------------------
time_parse.rb (237 Bytes)


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