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src: use single ObjectTemplate for TextDecoder #32426

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ObjectTemplates are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: #32424

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

`ObjectTemplate`s are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: nodejs#32424
@nodejs-github-bot nodejs-github-bot added the c++ Issues and PRs that require attention from people who are familiar with C++. label Mar 22, 2020
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ObjectTemplates are not garbage-collected like regular objects (for some reason).

They are but they're also cached on instantiation. The cache is of bounded size so the memory leak is bounded too but it's still pretty big (on the order of 1 million entries, I think.)

gengjiawen pushed a commit that referenced this pull request Mar 26, 2020
`ObjectTemplate`s are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: #32424

PR-URL: #32426
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
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Landed in b950daf

@gengjiawen gengjiawen closed this Mar 26, 2020
MylesBorins pushed a commit that referenced this pull request Mar 26, 2020
`ObjectTemplate`s are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: #32424

PR-URL: #32426
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Mar 26, 2020
@addaleax addaleax deleted the textdecoder-memoryleak branch March 28, 2020 13:30
targos pushed a commit to targos/node that referenced this pull request Apr 25, 2020
`ObjectTemplate`s are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: nodejs#32424

PR-URL: nodejs#32426
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
targos pushed a commit that referenced this pull request Apr 28, 2020
`ObjectTemplate`s are not garbage-collected like regular objects
(for some reason). It is sufficient to create a single template
anyway, so do that to address the memory leak.

Fixes: #32424

PR-URL: #32426
Reviewed-By: Gus Caplan <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
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Memory leak with util.TextDecoder
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