Couldn't read the profile (JSON deserialization error)

I’m getting

Error: Unserializing the profile failed: SyntaxError: Unexpected token r in JSON at position 11

when dragging/picking a file named test.perf whose first 100 lines are in this gist: https://gist.github.com/fasterthanlime/18b5932133186598c26f0e335d8fa1aa

the file was generated via perf record stuff && perf script -F +pid > test.perf

---

context: originally came from https://www.reddit.com/r/rust/comments/vyb9rt/comment/ig14wa2/?utm_source=reddit&utm_medium=web2x&context=3

[mstange]

Oh, I missed this comment.

Ah, while I have you: any chance of getting something chrome://tracing-style into the Firefox profiler?

It looks like we have #2166 open for this format. So yes, it’s something we’d like to support, but nobody has done the work yet.

I’m looking for a pipeline from not-perf to the Firefox profiler

I’m currently working on a fork of not-perf which outputs the Firefox profiler format. I’ll let you know once I’ve published it on github.

[mstange]

I’ve pushed the Linux profile recording code into the repo and published a version of samply with it.

$ cargo install samply
$ samply record ./yourcommand args

I’m going to write up my plans in the repo, when I get a chance.