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Memory optimization #104

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merged 1 commit into from
Aug 24, 2022
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casperisfine
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regexes.yaml contains quite a lot of duplicated strings.
By passing freeze: true to YAML.load we allow the parser to deduplicate them.

Additionally, the regexes source and flags are never used, so they
can be removed from the long lived hashes.

Before:

Total allocated: 3.47 MB (28214 objects)
Total retained: 1.45 MB (8422 objects)

After:

Total allocated: 3.71 MB (30218 objects)
Total retained: 1.24 MB (4583 objects)

It's not a big difference in size, but it cuts down in half the number
of objects than need to be marked by the GC.

@opti
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opti commented Jul 7, 2022

@casperisfine thank you for your PR! Seems like freeze is not supported on the older ruby versions.

@casperisfine
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Ah right, I forgot to check for support.

@casperisfine
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Done.

`regexes.yaml` contains quite a lot of duplicated strings.
By passing `freeze: true` to `YAML.load` we allow the parser to deduplicate them.

Additionally, the regexes source and flags are never used, so they
can be removed from the long lived hashes.

Before:
```
Total allocated: 3.47 MB (28214 objects)
Total retained: 1.45 MB (8422 objects)
```

After:
```
Total allocated: 3.71 MB (30218 objects)
Total retained: 1.24 MB (4583 objects)
```

It's not a big difference in size, but it cuts down in half the number
of objects than need to be marked by the GC.
@opti opti merged commit acc3bdf into ua-parser:main Aug 24, 2022
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3 participants