GitHub user librucha opened a pull request:
https://github.com/apache/commons-lang/pull/27
Reimplemented normalize space
Hi.
I reimplemented normalize space method of String utils, because regexp is
much more rich operation than array traversing and I use this normalization
often.
Here is benchmark created using google caliper.
0% Scenario{vm=java, trial=0, benchmark=ApacheNormalize, length=0} 1553.39
ns; Ï=142.64 ns @ 10 trials
13% Scenario{vm=java, trial=0, benchmark=NewNormalize, length=0} 114.80 ns;
Ï=1.00 ns @ 3 trials
25% Scenario{vm=java, trial=0, benchmark=ApacheNormalize, length=10}
1513.44 ns; Ï=133.58 ns @ 10 trials
38% Scenario{vm=java, trial=0, benchmark=NewNormalize, length=10} 114.49
ns; Ï=1.05 ns @ 3 trials
50% Scenario{vm=java, trial=0, benchmark=ApacheNormalize, length=100}
1545.23 ns; Ï=107.97 ns @ 10 trials
63% Scenario{vm=java, trial=0, benchmark=NewNormalize, length=100} 114.28
ns; Ï=0.65 ns @ 3 trials
75% Scenario{vm=java, trial=0, benchmark=ApacheNormalize, length=1000}
1550.35 ns; Ï=138.57 ns @ 10 trials
88% Scenario{vm=java, trial=0, benchmark=NewNormalize, length=1000} 115.16
ns; Ï=1.14 ns @ 3 trials
benchmark length ns linear runtime
ApacheNormalize 0 1553 ==============================
ApacheNormalize 10 1513 =============================
ApacheNormalize 100 1545 =============================
ApacheNormalize 1000 1550 =============================
NewNormalize 0 115 ==
NewNormalize 10 114 ==
NewNormalize 100 114 ==
NewNormalize 1000 115 ==
vm: java
trial: 0
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/librucha/commons-lang trunk
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/commons-lang/pull/27.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #27
----
commit 07437c259692e6f6ecdcef86411586df6800cffd
Author: Libor Ondrusek <[email protected]>
Date: 2014-06-20T09:36:43Z
Reimplemented normalize space
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