improve library loading times by caching #127
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maxim-v4s
reviewed
Oct 22, 2025
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| def _cached_getsourcelines(obj: Any) -> tuple: | ||
| """Cached version of inspect.getsourcelines(). | ||
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| Args: | ||
| obj: The object to get the source lines for | ||
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| Returns: | ||
| Tuple of (lines, line_number) | ||
| """ | ||
| cache = _inspection_cache.get() | ||
| if cache is None: | ||
| # Not in a caching context, use original function | ||
| return _original_getsourcelines(obj) | ||
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| # Use special key format to avoid collision with other caches | ||
| cache_key = ('sourcelines', id(obj)) | ||
| if cache_key not in cache: | ||
| cache[cache_key] = _original_getsourcelines(obj) | ||
| return cache[cache_key] |
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This function has never been called.
I guess it can be removed.
| return _original_getsourcefile(obj) | ||
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| # Use special key format to avoid collision with getmodule cache | ||
| cache_key = ('sourcefile', id(obj)) |
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In _cached_getmodule cache key is (id(obj), _filename).
In _cached_getsourcefile cache key is ('sourcefile', id(obj)).
I guess key should has same key strucure ('<function_key>', <funciton args>...)
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| cache = _inspection_cache.get() | ||
| if cache is None: | ||
| # Not in a caching context, use original function | ||
| return _original_getmodule(obj, _filename) | ||
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| # Use object id and filename as cache key | ||
| cache_key = (id(obj), _filename) | ||
| if cache_key not in cache: | ||
| cache[cache_key] = _original_getmodule(obj, _filename) | ||
| return cache[cache_key] |
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I'm confused a little.
A large percentage of calls contain a Frame object as an argument.
And it's a little strange to use id of Frame as cache key. But it's working here.
I'm still researching
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https://quantum-machines.atlassian.net/browse/QUAL-1338
This brought the library loading time down from 3.6s to ~1s