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  1. 13 Feb, 2017 1 commit
    • bmeurer's avatar
      [es2015] Remove the @@hasInstance protector cell. · 1a236208
      bmeurer authored 
      We cannot skip the @@hasInstance lookup in instanceof depending on a
global protector cell, as the lookup of the property is observable
via proxies or accessors. So remove the global protector and properly
implement CSA::InstanceOf via GetPropertyStub, with an appropriate
fast-path for Function.prototype[@@hasInstance] where we call the
builtin code object directly if the function matches, skipping all
the checks from the call sequence, and also avoid the redundant
ToBoolean conversion on the result.

R=yangguo@chromium.org
TBR=ulan@chromium.org
BUG=v8:5958

Review-Url: https://codereview.chromium.org/2684033012
Cr-Commit-Position: refs/heads/master@{#43137}
      1a236208
  3. 30 Jan, 2017 1 commit
  5. 16 Nov, 2016 1 commit
  7. 15 Nov, 2016 1 commit
    • petermarshall's avatar
      Fastpath some spread-call desugaring. · a63eeb48
      petermarshall authored 
      Avoid using the iterator for arrays with fast elements where the iterator has
not been modified.

Only deals with the case where there is a single spread argument.

Improves the six-speed "spread" benchmark to 1.5x slower than baseline es5 implementation, compared to 19x slower previously.

BUG=v8:5511

Review-Url: https://codereview.chromium.org/2465253011
Cr-Commit-Position: refs/heads/master@{#40998}
      a63eeb48
  9. 14 Nov, 2016 1 commit
  11. 30 Sep, 2016 1 commit
  13. 29 Sep, 2016 2 commits
  15. 23 Sep, 2016 1 commit
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  21. 05 Aug, 2016 2 commits
  23. 04 Aug, 2016 1 commit
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  29. 14 Jun, 2016 1 commit
  31. 13 Jun, 2016 2 commits
  33. 06 Jun, 2016 1 commit
  35. 17 May, 2016 1 commit
    • bmeurer's avatar
      [es6] Reintroduce the instanceof operator in the backends. · 551e0aa1
      bmeurer authored 
      This adds back the instanceof operator support in the backends and
introduces a @@hasInstance protector cell on the isolate that guards the
fast path for the InstanceOfStub. This way we recover the ~10%
regression on Octane EarleyBoyer in Crankshaft and greatly improve
TurboFan and Ignition performance of instanceof.

R=ishell@chromium.org
TBR=hpayer@chromium.org,rossberg@chromium.org
BUG=chromium:597249, v8:4447
LOG=n

Review-Url: https://codereview.chromium.org/1980483003
Cr-Commit-Position: refs/heads/master@{#36275}
      551e0aa1
  37. 12 May, 2016 1 commit
  39. 10 May, 2016 1 commit
    • littledan's avatar
      Various species micro-optimizations · f98caf44
      littledan authored 
      - Inline reads to the species protector
- Put V8_LIKELY/V8_UNLIKELY to guide Array.prototype.{slice,splice,concat}
  to the fast paths
- Put the Array species good path checks directly in
  Array.prototype.concat to avoid a couple reads of the array constructor
  from the native context

These changes together bring a ~4-6% win on
kraken-orig/stanford-crypto-pbkdf2-orig which more than makes up from
the performance degradation from a recent other species-related change.

BUG=chromium:609739
R=cbruni@chromium.org
LOG=Y

Review-Url: https://codereview.chromium.org/1958713003
Cr-Commit-Position: refs/heads/master@{#36121}
      f98caf44
  41. 29 Apr, 2016 2 commits
  43. 28 Apr, 2016 1 commit
  45. 27 Nov, 2015 3 commits
  47. 02 Nov, 2015 1 commit
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  61. 12 May, 2014 1 commit
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  65. 29 Apr, 2014 1 commit