jrmuizel’s gists

jrmuizel / mallocwrap.c

Created October 17, 2025 15:03

Hook malloc

	// profiling_zone.c
	#include <malloc/malloc.h>
	#include <dlfcn.h>
	#include <stdlib.h>
	#include <unistd.h>

	// Profiling callback function pointers
	static void (profiling_alloc_callback)(void ptr, size_t reserved_size, size_t used_size) = NULL;
	static void (profiling_free_callback)(void ptr, size_t reserved_size, size_t used_size) = NULL;

jrmuizel / trr channel annotation

Last active October 15, 2025 15:35

	commit d38a61ab87acab9c1e379cfe952082c22da08d55
	Author: Jeff Muizelaar <[email protected]>
	Date: Fri Nov 15 09:57:49 2024 +0100

	trr channel annotation

	diff --git a/netwerk/protocol/http/TRRServiceChannel.cpp b/netwerk/protocol/http/TRRServiceChannel.cpp
	index 85e6d299e869f..dd4335149aa2e 100644
	--- a/netwerk/protocol/http/TRRServiceChannel.cpp
	+++ b/netwerk/protocol/http/TRRServiceChannel.cpp

jrmuizel / gist:c2bc7710ccb050758b47b876c6096c9c

Created October 15, 2025 15:23

	commit fbaacca0ea987d5e231f5dc05fd11d222bfdf2b0
	Author: Jeff Muizelaar <[email protected]>
	Date: Wed Nov 6 23:19:11 2024 -0500

	Socket markers

	diff --git a/netwerk/base/nsSocketTransport2.cpp b/netwerk/base/nsSocketTransport2.cpp
	index 8952bbebd9f9a..e800018820091 100644
	--- a/netwerk/base/nsSocketTransport2.cpp
	+++ b/netwerk/base/nsSocketTransport2.cpp

jrmuizel / gist:cc9d8d48fb79893f39b86f1488afdff2

Last active May 23, 2025 12:40

iOS browser market share

jrmuizel / rust-flows.patch

Created May 5, 2025 14:37

	commit 815f5a4bd71cdd73dad134125dde89c8e6ec45bd
	Author: Jeff Muizelaar <[email protected]>
	Date: Fri Nov 15 10:38:17 2024 +0100

	Rust flow

	diff --git a/netwerk/protocol/http/nsHttpTransaction.cpp b/netwerk/protocol/http/nsHttpTransaction.cpp
	index e6bba66b6fff9..ee6fc53401720 100644
	--- a/netwerk/protocol/http/nsHttpTransaction.cpp
	+++ b/netwerk/protocol/http/nsHttpTransaction.cpp

jrmuizel / JsonWriter.java

Created May 3, 2025 01:31

Stream string values

	class StringWriter extends Writer {
	public StringWriter(Writer out) {
	this.out = out;
	}

	@Override
	public void write(char[] cbuf, int off, int len) throws IOException {
	for (int i = 0; i < len; i++) {
	char c = cbuf[i + off];
	/*

jrmuizel / profile.py

Created April 30, 2025 15:13

	import subprocess
	import os

	tests_with_workers = ["Air", "Basic", "ML", "Babylon", "cdjs",
	"first-inspector-code-load", "multi-inspector-code-load",
	"Box2D", "octane-code-load", "crypto", "delta-blue",
	"earley-boyer", "gbemu", "mandreel", "navier-stokes",
	"pdfjs", "raytrace", "regexp", "richards", "splay",
	"typescript", "octane-zlib", "FlightPlanner", "OfflineAssembler",
	"UniPoker", "async-fs", "float-mm.c", "hash-map",

jrmuizel / gist:d8ff86d67e478c1ad7706f1679497fde

Created April 4, 2025 02:50

This file has been truncated, but you can view the full file.


	./dist/bin/libxul.so: file format elf64-little

	SYMBOL TABLE:
	000000000886a8d0 l .data.rel.ro 0000000000000000 $d.2
	000000000886a8d0 l O .data.rel.ro 0000000000000008 .hidden __dso_handle
	000000000886a8d8 l .data.rel.ro 0000000000000000 $d
	000000000886aa40 l .data.rel.ro 0000000000000000 $d
	000000000886b540 l .data.rel.ro 0000000000000000 $d
	000000000886b610 l .data.rel.ro 0000000000000000 $d

jrmuizel / vt.html

Created February 19, 2025 19:33

jrmuizel / profiling-python-with-perf.md

Created September 27, 2024 17:42

Profiling python with perf

Get a Python that has frame pointers enabled

CFLAGS="-fno-omit-frame-pointer -mno-omit-leaf-frame-pointer" pyenv install 3.12

pyenv shell 3.12

Run python with perf support turned on

Jeff Muizelaar jrmuizel