Parsing speed improvements #4297
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aboedo
approved these changes
Oct 10, 2024
| return calendar | ||
| }() | ||
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| private func toDateTryFastParsing() -> Date? { |
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dumb little nitpicks that you can totally disregard:
privatehere is redundant in that the extension is already private, we try not to repeat
We usually add line breaks after extension definitions and before they end
See examples in the style guide
Also, given that the method already returns an optional type, it feels like the try part is also redundant, I'd maybe go with toDateFastParse
Again, I don't feel particularly strongly about any of these tbh
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Done.
Please let me know if there is anything else you wish me to change.
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Checklist
purchases-androidand hybridsMotivation
I was scrolling through your code and saw
Which suggested that you care about performance of the parser. Since I wanted to improve my profiling skills here we are :)
Issue: #4006
Description
Improved performance of parsing receipt (which is mostly parsing of dates).
From profiler I saw that most of the time is spent in
ArraySlice.toDate().By removing
dateString = Stringand using system Calendar I was able to sigificently speed up the process.As fallback I left previous
ISO8601DateFormatter.default.dateExample results on iPhone 8
Datemach_absolute_timeCyclesINST_ALLL1D_TLB_MISSI've also added some additional test cases based on example receipts I was able to find through internet.