[MacRuby-devel] Yet yet another String performance issue

[Yasu Imao]

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