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EdwardCooke
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May 14, 2025
This cuts about 20% of parsing time and probably more in final object graph size, depending on input data of course. In terms of the LoadLarge benchmark: | Method | Mean | Error | StdDev | Gen0 | Gen1 | Gen2 | Allocated | |-----------------:|---------:|--------:|---------:|----------:|----------:|----------:|----------:| | LoadLarge before | 136.9 ms | 3.11 ms | 9.03 ms | 7500.0000 | 3500.0000 | 1500.0000 | 39.65 MB | | LoadLarge after | 114.4 ms | 3.70 ms | 10.67 ms | 6000.0000 | 2000.0000 | 1000.0000 | 39.65 MB | This is just simple string.Intern calls. It's not that much, but it affects a startup time I care about. The change could negatively affect the intern pool if random keys are in the input.
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I incorporated your comments. But then I revisited my thinking about interning, performance and security. Real programs will have the keys they care about interned already, meaning we should prefer soft interning (IsInterned) to avoid loading the intern pool with crap. But this will be harder to benchmark. I think it boils down to security. If you want YamlDotNet to be resilient to hostile input, I'm happy to switch to IsInterned. |
EdwardCooke
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Apr 9, 2026
This was referenced Apr 9, 2026
This was referenced Apr 10, 2026
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This cuts about 20% of parsing cost and probably more in final object graph size, depending on input data.
In terms of the LoadLarge benchmark:
This is just a simple string.Intern call. It might make sense to emplyor pass a pool, like a XmlNameTable does with XML, to save on scalar objects not just strings.