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Markdown makes huge amount of memory allocations during indexing #120

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piotrtomiak opened this issue May 18, 2023 · 1 comment
Open

Markdown makes huge amount of memory allocations during indexing #120

piotrtomiak opened this issue May 18, 2023 · 1 comment

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@piotrtomiak
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piotrtomiak commented May 18, 2023 •
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The LookaheadText.testFromPosition depends on String.subSequence which actually copies the content over to a new array:
ultimate – LookaheadText kt jetbrains markdown 2023-05-18 21-17-40

As a result during 15s of indexing, even 1.7GB of data can be allocated. You can check it out by profiling indexing of https://github.com/JetBrains/ring-ui/tree/master in WebStorm.

It seems that it would be best to use something similar to com.intellij.util.text.CharSequenceSubSequence to save a lot on memory allocations.
@piotrtomiak
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https://youtrack.jetbrains.com/issue/IDEA-320694

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