Hello,
I'm rewriting an app for text analysis in MacRuby, which I originally wrote in
RubyCocoa. But I encountered a serious performance issue in MacRuby, which is
related to processing text using regular expressions.
I'm wondering if this will be taken care of in the near future (or already done
in 0.8?).
Below are my simple tests. The first two are essentially the same with a
slightly different approach. Both are simply counting frequency of each word.
I want to use the first approach not to count word frequencies, but in other
processes. The third one is to test the speed of String#gsub with regular
expression. I felt String#gsub was slow in my app, so I just wanted to test
how slow it is compared to RubyCocoa.
Test 1 - scan-block
freq = Hash.new(0)
text.scan(/\w+/) do |word|
freq[word] += 1
end
Test 2 - scan array.each
freq = Hash.new(0)
text.scan(/\w+/).each do |word|
freq[word] += 1
end
Test 3 - gsub upcase
text.gsub!(/\w+/){|x| x.upcase}
The results are in seconds. The original text is in English with 8154 words.
Each process was repeated 10 times to calculate processing times. Each test
were done 3 times.
Ruby 1.8.7 Test1 - scan-block: 0.542, 0.502,
0.518
Ruby 1.8.7 Test2 - scan array.each: 0.399, 0.392,
0.399
Ruby 1.8.7 Test3 - gsub upcase: 0.384, 0.349, 0.390
MacRuby 0.7.1 Test1 - scan-block: 27.612, 27.707, 27.453
MacRuby 0.7.1 Test2 - scan array.each: 3.556, 3.616, 3.554
MacRuby 0.7.1 Test3 - gsub upcase: 27.613, 26.826, 27.327
Thanks,
Yasu
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