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Performance improvements #230

Merged
merged 1 commit into from
Sep 10, 2018
Merged

Performance improvements #230

merged 1 commit into from
Sep 10, 2018

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ilyapuchka
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@ilyapuchka ilyapuchka commented Sep 8, 2018

Trying to address performance issues introduced by #167

  • do not parse lines for each token, do that once when lexer is created

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@yonaskolb if you have a chance could you please try this branch with your benchmark or add measurement tests if you have written any already?

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@ilyapuchka I ran the same tests again and got great results!
before: 6.42
after: 0.45

Nice work! 🎉

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@yonaskolb thanks! seems acceptable so we can merge it then and someone makes a patch release?

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it would be better to include some measurement tests though while we are on that, to avoid such things in future

@ilyapuchka ilyapuchka merged commit acda1b0 into master Sep 10, 2018
@ilyapuchka ilyapuchka deleted the errors-logs-improvements branch September 10, 2018 10:39
@yonaskolb yonaskolb changed the title [WIP] Performance improvements Performance improvements Sep 10, 2018
@djbe djbe added this to the 0.13.0 milestone Sep 21, 2018
@djbe djbe mentioned this pull request Sep 24, 2018

self.lines = templateString.components(separatedBy: .newlines).enumerated().flatMap {
guard !$0.element.isEmpty else { return nil }
return (content: $0.element, number: UInt($0.offset + 1), templateString.range(of: $0.element)!)
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@AliSoftware AliSoftware Sep 26, 2018

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Catching up and reading that PR content a little late…

@ilyapuchka @djbe Doesn't that templateString.range(of: $0.element) introduce the risk that you get the wrong range if the template have multiple similar lines? And also, searching the whole templateString for that $0.element might take some time especially for long templateString strings?

Shouldn't we instead keep a running total of characters up to each line, and construct the range from range = (currentCharIndex..<currentCharIndex + $0.element.length) then curentCharIndex = thatRange.endIndex+1 or something similar to avoid such risk?

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4 participants