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    • bmeurer's avatar
      [builtins] Simplify String constructor code. · eadfd666
      bmeurer authored 
      The String constructor was somewhat complex with a lot of micro
optimizations that are not relevant or even misguided. It would be
really hard to port that code to ES6, which requires String to be
subclassable. So as a first step we reduced the necessary complexity
to the bare minimum (also removing the last user of the fairly complex
MacroAssembler::LookupNumberStringCache method).

This also removes the counters for the String constructor, which
were not properly exposed anymore (and not kept in sync with inlined
versions of the String constructor anyway).

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1335193002

Cr-Commit-Position: refs/heads/master@{#30706}
      eadfd666
  17. 10 Aug, 2015 1 commit
  19. 07 May, 2015 1 commit
    • ulan's avatar
      Add aggregated memory histograms. · d77839fd
      ulan authored 
      This introduces V8.MemoryHeapCommitted and V8.MemoryHeapUsed histograms.

In contrast to the existing memory histograms, the new histograms are uniform in time, i.e. their samples happen at regular time intervals. The --histogram-interval specifies the length of the interval.

We implement this by linearly interpolating memory stats between GC and idle notification events.

BUG=chromium:485472
LOG=NO

Review URL: https://codereview.chromium.org/1125683004

Cr-Commit-Position: refs/heads/master@{#28292}
      d77839fd
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    • vogelheim's avatar
      Implement AggregatableHistogramTimer and use it to measure how much time · 6f9d60cc
      vogelheim authored 
      of running a script is really spent in compilation. That is, sum up the
total time spent compiling (parsing + compile proper) within a run call
as seen through the API.

@jochen: So many questions:
- Is it ok to re-use V8.CompileLazy?
  This measures something a little different.
- clang-format does funny things to the huge macro definitions.
  I accepted clang-format changes for all code, but reverted for
  the #define orgies in counters.h. ok?
- Am I measuring the right thing. That is, are Aggregat[ing|ed]TimerScope
  in the right place?

I'll fiddle a bit more with this to see if it does the right thing. Would
be happy if you could still review now-ish.

BUG=

Review URL: https://codereview.chromium.org/790413004

Cr-Commit-Position: refs/heads/master@{#26226}
      6f9d60cc
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