- 30 Nov, 2017 2 commits
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Michael Achenbach authored
This reverts commit e42e7fc8. Reason for revert: Speculative revert for: https://crbug.com/v8/7149 Original change's description: > [objects] No longer create short external strings. > > This fixes String::MakeExternal() to bail out if the subject string > doesn't fit a regular ExternalString, instead of creating a short > external string. The observation here is that for short external strings > the overhead of having to have the StringResource plus going to the > runtime/C++ for each and every character access from JavaScript land > is probably bigger than the anticipated benefits. > > If this turns out to be wrong and there's a real benefit, we should make > use of ThinStrings instead of having a separate way to represent > external strings. > > Bug: v8:6621, v8:7109, v8:7145 > Change-Id: I4b75da08b82a72027c782a69de9c8eaf3cca1d4d > Reviewed-on: https://chromium-review.googlesource.com/799750 > Reviewed-by: Yang Guo <yangguo@chromium.org> > Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> > Cr-Commit-Position: refs/heads/master@{#49735} TBR=yangguo@chromium.org,bmeurer@chromium.org Change-Id: I3f5cfa9ab5c99ddce1d61ede9ed9515cb3936cdd No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: v8:6621, v8:7109, v8:7145, v8:7149 Reviewed-on: https://chromium-review.googlesource.com/801675Reviewed-by: Michael Achenbach <machenbach@chromium.org> Commit-Queue: Michael Achenbach <machenbach@chromium.org> Cr-Commit-Position: refs/heads/master@{#49770}
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Benedikt Meurer authored
This fixes String::MakeExternal() to bail out if the subject string doesn't fit a regular ExternalString, instead of creating a short external string. The observation here is that for short external strings the overhead of having to have the StringResource plus going to the runtime/C++ for each and every character access from JavaScript land is probably bigger than the anticipated benefits. If this turns out to be wrong and there's a real benefit, we should make use of ThinStrings instead of having a separate way to represent external strings. Bug: v8:6621, v8:7109, v8:7145 Change-Id: I4b75da08b82a72027c782a69de9c8eaf3cca1d4d Reviewed-on: https://chromium-review.googlesource.com/799750Reviewed-by: Yang Guo <yangguo@chromium.org> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#49735}
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- 07 Mar, 2017 1 commit
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mvstanton authored
BUG=v8:5267, chromium:692409 Review-Url: https://codereview.chromium.org/2720713003 Cr-Commit-Position: refs/heads/master@{#43638}
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- 10 Sep, 2014 1 commit
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yangguo@chromium.org authored
R=dcarney@chromium.org, marja@chromium.org Review URL: https://codereview.chromium.org/559913002 git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23840 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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- 25 Nov, 2011 1 commit
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yangguo@chromium.org authored
TEST=test/mjsunit/string-external-cached.js Review URL: http://codereview.chromium.org/8680010 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10070 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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- 23 Nov, 2011 3 commits
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yangguo@chromium.org authored
Review URL: http://codereview.chromium.org/8677006 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10054 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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yangguo@chromium.org authored
Review URL: http://codereview.chromium.org/8681007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10050 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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yangguo@chromium.org authored
BUG= TEST= Review URL: http://codereview.chromium.org/8635011 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10049 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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- 17 Nov, 2011 1 commit
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yangguo@chromium.org authored
TEST=test/mjsunit/string-externalize.js Review URL: http://codereview.chromium.org/8513010 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10023 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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- 28 Oct, 2010 1 commit
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erik.corry@gmail.com authored
Review URL: http://codereview.chromium.org/4116005 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5724 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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- 17 Jun, 2010 1 commit
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vitalyr@chromium.org authored
If a two-byte string only contains ascii characters, then we can save memory when flattening a cons string containing it. Similarly we can use this in Array.prototype.join implementation. To track this a new bit is added to instance type. This bit is used as a hint in generated code and in runtime functions. To enable testing a new V8 extension is added controlled by --expose-externalize-string flag. Review URL: http://codereview.chromium.org/2762008 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4894 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
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