jlfwong/speedscope

Format Support: concatenated output from many calls to jstack

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#173 opened on Oct 7, 2018

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 (3 comments) (0 reactions) (0 assignees)TypeScript (319 forks)batch import
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Description

Poor man's profiling of a JVM:

$ for i in `seq 1 300`;do jstack $(pgrep java) > $i.jstack;sleep 1;done;zip profile.zip *.jstack;rm *.jstack

...and then uploading profile.zip. I'm tired of opening up traffic for profiling to production and/or building lots of tooling around it. jstack (and shell) is always availalable.

Contributor guide

Research direction
Study the existing profile parsing code in speedscope, particularly how individual jstack outputs are handled. Understand the format of concatenated jstack output and implement a parser that splits and processes it correctly. Look for existing tests and ensure new functionality is covered.
Tech stack
typescript
Domain
performancedeveloper experience
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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.
Mostly clear
Prerequisites
JavaScript/TypeScriptGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60