All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=823507

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3ed75cc0cd826783410f702eed93c4cccc3593a62f089eabca8e7f342d996f78


Bot(s) for this bug's original alert(s):

android-nexus7v2

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/14a9d719440000

📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/14a9d719440000

Reland "[builtins] Remove off-heap builtins from the snapshot" by jgruber@chromium.org
https://chromium.googlesource.com/v8/v8/+/fd70917d520ea7bbcc5e401776c7dac7120c6942

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

 Issue 823930  has been merged into this issue.

 Issue 823932  has been merged into this issue.

 Issue 823933  has been merged into this issue.

Issue 824669 has been merged into this issue.

Also tanks the web-tooling-benchmark: https://chromeperf.appspot.com/report?sid=6fe9ca9c0ec4886945c39c85a13e304ecd494011faded6d626562a98aa9b1611 and https://arewefastyet.com/#machine=29&view=breakdown&suite=web-tooling-benchmark.

Yep, web-tooling-benchmark is what I've been using to bench locally since it's so convenient.

I haven't yet had the time to focus on these regressions. What I know so far is that indirections for constants and external references contribute. 

It's surprising though that the regressions bisect to this CL, which just switches execution from on-heap code to off-heap, binary-embedded code, without changing the code itself. There's something here that I don't understand yet.

I'm currently hacking on landing a few final CLs for the off-heap mechanism, will focus on performance once that is done (early next week). If we don't have a good perf solution in sight by mid next week, we'll flip v8_enable_embedded_builtins back to false for the next release.

Duping this into https://crbug.com/819121. See http://goo.gl/vjjyB6 for an analysis of the current state.