[TASK] Avoid poor scaling of array_search() with very long arrays (#413)#628
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oliverklee merged 2 commits intov8.xfrom Jun 29, 2024
Merged
[TASK] Avoid poor scaling of array_search() with very long arrays (#413)#628oliverklee merged 2 commits intov8.xfrom
oliverklee merged 2 commits intov8.xfrom
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…413) When there were many many elements in `$aStack`, starting the delimiter search from the beginning for each loop iteration was very slow. This is addressed by building a new array, rather than modifying `$aStack` in place, and iterating over it in a single pass. A particular 1.6M style string is now parsed in 5 seconds rather than 4 minutes.
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This set of PRs (this, #627, #623, #624 - in chronological order of original changes) will need rebasing after each other is merged, due to conflict in They are the current set of enhancements that can be backported for 8.6. I've created a |
oliverklee
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Jun 29, 2024
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When there are many many elements in $aStack, starting the delimiter search from the beginning for each loop is very very slow. I addressed this by building a new array rather than modifying $aStack in place and iterating over it in a single pass. The particular 1.6M style string that was giving me trouble went from taking 4 minutes to parse to 5 seconds.