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Starred by 4 users

Issue metadata

Status: Fixed
Owner: ----
Closed: Aug 9
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Linux , Windows , Mac
Pri: 2
Type: Bug

Blocked on:
issue 787421



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Why chrome/chromium webassembly launching performance is the lowest?

Reported by shader.y...@gmail.com, Mar 30 2018

Issue description

UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36

Steps to reproduce the problem:
1. Access test link https://www.mujigame.com/muji/samurai2/index.html on PC or macOS
2. Watch the logs for webassembly launching time
3. Accumulate the 5 phases time to do comparison

What is the expected behavior?
I think chrome/chromium performance would be not lower than others.

What went wrong?
The actual result is chrome/chromium performance is the lowest.

Did this work before? N/A 

Chrome version: 65.0.3325.181  Channel: stable
OS Version: OS X 10.13.3
Flash Version:
 
chrome_wasm_launching.jpg
146 KB View Download
safari_wasm_launching.jpg
110 KB View Download
firefox_wasm_launching.jpg
142 KB View Download

Comment 1 by rtoy@chromium.org, Mar 30 2018

Components: -Blink Blink>JavaScript>WebAssembly
Labels: Needs-Triage-M65
Labels: Triaged-ET M-67 Target-67 FoundIn-67 OS-Linux OS-Windows
Status: Untriaged (was: Unconfirmed)
Able to reproduce the issue on Mac 10.13.3, Win-10 and Ubuntu 14.04 using chrome reported version #65.0.3325.181 and latest canary #67.0.3387.0.
This is a non-regression issue as it is observed from M60 old builds. 

Hence, marking it as untriaged to get more inputs from dev team.

Thanks...!!
This is generally due to Chrome/V8's single-tier system for WebAssembly. We're working on a faster startup tier that will pull us more in line with Mozilla, which we hope to get sometime in Q2.
Helpful information, looking forward the high performance version, thanks all!
Blockedon: 787421
Status: Available (was: Untriaged)
Please provide any news about new faster startup tier. Q2 is almost over. This is a critical issue for many developers.

Comment 8 by titzer@chromium.org, Jun 28 2018

Hi, Liftoff is on track to launch in Chrome 69.
Hello, it seems that Liftoff was disabled with Chrome 70. There was a big performance improvement with Chrome 69, but it gone with Chrome 70. 
Status: Fixed (was: Available)
Marking as fixed.

c9: You might have fallen victim to our infrastructure flipping the feature on/off for A/B testing. It should be turned on by default in 70 now.

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