src: cache and resue isolate and contex pointers #23024
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Many places these values are obtained through `env` pointer that incurs function calls. Source in once and re-use as much as possible. There are more of this pattern in this file, but those are either one-time use or used in conditional blocks which means sourcing-in those data early may not be beneficial.
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addaleax
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@gireeshpunathil I’m not sure … the commit message makes it sound like this is about performance? These calls should all be essentially free in terms of runtime cost, so this is mostly a question of readability, and I’m not sure it’s worth the churn if the goal is to apply these kinds of changes everywhere…
In any case, this PR LGTM if you’re volunteering to backport this as soon as it lands :)
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sure, thanks @addaleax . runtime cost was a consideration which I thought of it first, but your point makes sense to me now as these calls boils down to mere field accesses. |
jasnell
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devsnek
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Sep 22, 2018
addaleax
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Landed in ea3bb9a. |
danbev
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Many places these values are obtained through `env` pointer that incurs function calls. Source in once and re-use as much as possible. There are more of this pattern in this file, but those are either one-time use or used in conditional blocks which means sourcing-in those data early may not be beneficial. PR-URL: #23024 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Gus Caplan <[email protected]>
targos
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Many places these values are obtained through `env` pointer that incurs function calls. Source in once and re-use as much as possible. There are more of this pattern in this file, but those are either one-time use or used in conditional blocks which means sourcing-in those data early may not be beneficial. PR-URL: #23024 Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Gus Caplan <[email protected]>
This was referenced Oct 10, 2018
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Many places these values are obtained through
envpointer that incurs function calls. Source in once and re-use as much as possible. There are more of this pattern in this file, but those are eitherone-time use or used in conditional blocks which means sourcing-in those data early may not be beneficial.
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes