RSS Parrot

Non-Traditional Profiling

https://www.mgaudet.ca/technical/2026/1/8/non-traditional-profiling

Published: January 8, 2026 21:46

Also known as “you can just put whatever you want in a jitdump you know?”When you profile JIT code, you have to tell a profiler what on earth is going on in those JIT bytes you wrote out. Otherwise the profiler will shrug and just give you some addresses.…

Using Keyboard Maestro to help with PiKVM Clipboard

https://www.mgaudet.ca/technical/2025/11/3/using-keyboard-maestro-to-help-with-pikvm-clipboard

Published: November 3, 2025 21:17

One of my least favourite things about PiKVM (which is otherwise awesome) is that there’s not a great ‘clipboard sync’ model for it; which is a pain when all you want to do is paste a URL or something into a remote machine.LocalSend has been very very…

Summer of Sharpening

https://www.mgaudet.ca/technical/2025/9/29/summer-of-sharpening

Published: September 29, 2025 16:54

As we head into fall, I wanted to write up a bit of an experience report on a project I ran this summer with a few other people on the SpiderMonkey team. A few of us on the team chose to block off some time during the summer to do intentional professional…

Getting myself out of a sticky jujutsu situation

https://www.mgaudet.ca/technical/2025/7/25/getting-myself-out-of-a-sticky-jujutsu-situation

Published: July 25, 2025 17:36

So I managed to get myself into a sticky situation with JJ where I had squashed together a whole bunch of crappy commits with the intention of then taking the large one and cutting it apart. So I squashed, rebased, then started cutting it apart... only to…

Finding hot allocation sites with bpftrace

https://www.mgaudet.ca/technical/2025/5/28/finding-hot-allocation-sites-with-bpftrace

Published: May 28, 2025 20:58

So, last time I said I was hooked, and that I wrote an allocation profiler. That’s true! And it was comparatively easy. Starting from the baseline of SpiderMonkey which sleeps before exit from the last blog post, the profiler looks like this: BEGIN { …

Exploring a language runtime with bpftrace

https://www.mgaudet.ca/technical/2025/5/28/exploring-a-language-runtime-with-bpftrace

Published: May 28, 2025 16:42

So I have been having quite a bit of fun learning about eBPF. It’s been on my todo list for like two or three years, but I’ve finally made the time to actually start to figure it out, and have already found some neat stuff, and had to do some fun hacking. …

A Performance Investigation Challenge

https://www.mgaudet.ca/technical/2025/5/9/a-performance-investigation-challenge

Published: May 9, 2025 20:24

I really liked matklad’s Performance Visualization challenge (partially because it didn’t take me long to find the line with samply, which made me feel good). Here’s a skills gap or research question perhaps: How do you identify an impactful but diffuse…

Learning about C++ Direction Setting

https://www.mgaudet.ca/technical/2025/5/9/learning-about-c-direction-setting

Published: May 9, 2025 16:03

Another blog post written wearing only my hat, rather than any Mozilla or TC39 Delegate related hats Last year while considering some JavaScript standards evolution, I wanted to look into how C++ handles some of the challenges. I dug through some…

Upgrade issue with jujutsu

https://www.mgaudet.ca/technical/2025/4/17/upgrade-issue-with-jujutsu

Published: April 17, 2025 20:46

Trying to update jujutsu I had a heck of a time. A previously working command stopped working. Running in a different directory, updating rust neither worked. The issue is this commit in the jujutsu repo. The symptom is: …

32 Bit Build of SpiderMonkey -- First in a while

https://www.mgaudet.ca/technical/2025/4/14/32-bit-build-of-spidermonkey-first-in-a-while

Published: April 14, 2025 21:03

Some quick notes on doing a recent 32 bit build of SpiderMonkey Mozconfig: ac_add_options --target=i686-pc-linux ac_add_options --enable-application=js ac_add_options --disable-optimize ac_add_options --enable-debug…