servo/webrender

Add "number of rasterized blob image pixels" to the webrender profiler overlay

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#2,801 opened on Jun 4, 2018

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 (6 comments) (1 reaction) (0 assignees)Rust (319 forks)github user discovery
area: infrastructurearea: performancedifficulty: easyhelp wantedtype: enhancement

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Description

Sometimes Gecko produces very large blob items, and it looks like there are cases where webrender chooses to rasterize the entire item instead of just the portion on the screen. It would be nice to be able to detect these cases with the webrender profiler. Usually I only notice these cases due to jank from the texture upload.

Contributor guide

Research direction
Examine the webrender profiler overlay code to see how existing metrics like primitives count are added. Then locate the blob image rasterization path in the codebase, and add a new counter for the number of rasterized pixels.
Tech stack
rust
Domain
performance
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65