[MacRuby-devel] Yet yet another String performance issue

[Laurent Sansonetti]

Hi Yasu,

Thanks for reporting this. I believe the optimization we added for #gsub can also be used in #split. I see that you filed a ticket, we will follow up there.

Laurent

On Jan 16, 2011, at 10:12 AM, Yasu Imao wrote:

> Hi again,
> 
> Another String performance issue.  Tested on a text file with 4360 lines (\n) (different from the one I used with other tests).  With these tests, 0.9 nightly is much much slower than 0.8, so I'll file a ticket for 0.9.
> 
> Test 1 - File.read("test.txt").split(/\n/)
> Test 2 - File.read("test.txt").split("\n")
> Test 1 - force_encoding - File.read("test.txt").force_encoding("UTF-16BE").split(/\n/)
> Test 2 - force_encoding - File.read("test.txt").force_encoding("UTF-16BE").split("\n".force_encoding("UTF-16BE"))
> 
> Test 3 - File.read("test.txt").lines {}
> 
> Ruby 1.8.7
> Test 1 - 0.0081  0.0078  0.0086
> Test 2 - 0.0078  0.0079  0.0079
> Test 3 - 0.0058  0.0053  0.0065
> 
> Ruby 1.9.2
> Test 1 - 0.0089  0.0090  0.0089
> Test 2 - 0.0035  0.0035  0.0035
> Test 3 - 0.0036  0.0035  0.0035
> 
> MacRuby 0.8 2011/01/16
> Test 1 - 0.026  0.039  0.023
> Test 2 - 0.019  0.018  0.018
> Test 3 - 0.023  0.020  0.026
> 
> MacRuby 0.9 2011/01/16
> Test 1 -  0.021  0.021  0.021
> Test 2 - 23.51  23.55  23.50
> Test 3 - 23.43  23.38  23.35
> 
> MacRuby 0.9 2011/01/16 - force_encoding
> Test 1 - 0.015  0.015  0.015
> Test 2 - 0.011  0.011  0.011
> 
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