Remove unnecessary call to trimStringObjectIfNeeded from tryObjectEnc…#11509
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uriyage wants to merge 1 commit intoredis:unstablefrom
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Remove unnecessary call to trimStringObjectIfNeeded from tryObjectEnc…#11509uriyage wants to merge 1 commit intoredis:unstablefrom
uriyage wants to merge 1 commit intoredis:unstablefrom
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oranagra
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Nov 15, 2022
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i don't like this change.
what it does is trim the excess space every time we put a large string into the argv array, even if that string isn't gonna end up retained, i.e. stored into the database.
the approach of the existing code, it to trim it only when we decide to keep it.
i'd rather change the code in trimStringObjectIfNeeded to be smarter and avoid excessive work.
i.e. it tries to get rid of 10% excess, but in fact the the allocator usually has up to 30% internal fragmentation, so this really became out of context when i made #7875.
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Call
trimStringObjectIfNeededonly when using thequerybufas the object's ptr.Currently, we call
trimStringObjectIfNeededfromtryObjectEncodingwhich is called for all set-commands.However, the only place where we might allocate a larger than necessary string object is when we use the
querybufitself as the object's value.trimStringObjectIfNeededmight be expensive as it tries to remove the internal fragmentation (a result of #7875 change).