http://simonwillison.net/2021-05-24T18:23:48+00:00Simon Willison2021-05-24T18:23:48+00:002021-05-24T18:23:48+00:00https://simonwillison.net/2021/May/24/how-to-look-at-the-stack-with-gdb/#atom-tag

<p><strong><a href="https://jvns.ca/blog/2021/05/17/how-to-look-at-the-stack-in-gdb/">How to look at the stack with gdb</a></strong></p> Useful short tutorial on gdb from first principles. <p>Tags: <a href="https://simonwillison.net/tags/c">c</a>, <a href="https://simonwillison.net/tags/debugger">debugger</a>, <a href="https://simonwillison.net/tags/julia-evans">julia-evans</a></p>

2021-03-01T19:12:03+00:002021-03-01T19:12:03+00:00https://simonwillison.net/2021/Mar/1/gta-loading-times/#atom-tag

<p><strong><a href="https://nee.lv/2021/02/28/How-I-cut-GTA-Online-loading-times-by-70/">How I cut GTA Online loading times by 70%</a></strong></p> Incredible debugging war story: t0st was fed up of waiting six minutes (!) for GTA Online to load on their PC, so they used a host of devious debugging tricks to try and figure out what was going on. It turned out the game was loading a 10MB JSON file detailing all of the available in-game purchases, but inefficient JSON parsing meant it was pegging an entire CPU for 4 minutes mainly running the strlen() C function. Despite not having access to source code or debugging symbols t0st figured out the problem and managed to inject a custom DLL that hooked some internal functions and dropped load times down from 6m down to to 1m50s! <p><small></small>Via <a href="https://news.ycombinator.com/item?id=26296339">Hacker News</a></small></p> <p>Tags: <a href="https://simonwillison.net/tags/debugger">debugger</a>, <a href="https://simonwillison.net/tags/hacking">hacking</a>, <a href="https://simonwillison.net/tags/profiling">profiling</a></p>

2009-11-18T12:34:29+00:002009-11-18T12:34:29+00:00https://simonwillison.net/2009/Nov/18/debugging/#atom-tag

<p><strong><a href="http://pythonconquerstheuniverse.wordpress.com/2009/09/10/debugging-in-python/">Debugging in Python</a></strong></p> The missing manual for Python’s powerful pdb debugger. <p>Tags: <a href="https://simonwillison.net/tags/debugger">debugger</a>, <a href="https://simonwillison.net/tags/debugging">debugging</a>, <a href="https://simonwillison.net/tags/pdb">pdb</a>, <a href="https://simonwillison.net/tags/python">python</a></p>

2009-11-01T12:09:20+00:002009-11-01T12:09:20+00:00https://simonwillison.net/2009/Nov/1/pudb/#atom-tag

<p><strong><a href="http://pypi.python.org/pypi/pudb/">pudb</a></strong></p> A full-screen, curses console based visual debugger for Python, built using the urwid console UI library. <p>Tags: <a href="https://simonwillison.net/tags/console">console</a>, <a href="https://simonwillison.net/tags/debugger">debugger</a>, <a href="https://simonwillison.net/tags/pdb">pdb</a>, <a href="https://simonwillison.net/tags/pudb">pudb</a>, <a href="https://simonwillison.net/tags/python">python</a>, <a href="https://simonwillison.net/tags/ui">ui</a>, <a href="https://simonwillison.net/tags/urwid">urwid</a></p>

2007-11-25T10:32:14+00:002007-11-25T10:32:14+00:00https://simonwillison.net/2007/Nov/25/debugbar/#atom-tag

<p><strong><a href="http://www.debugbar.com/">DebugBar</a></strong></p> Suggested at BarCamp London 3 as a useful tool for developing with IE; apparently includes a great JavaScript debugger. <p>Tags: <a href="https://simonwillison.net/tags/barcamplondon3">barcamplondon3</a>, <a href="https://simonwillison.net/tags/debugbar">debugbar</a>, <a href="https://simonwillison.net/tags/debugger">debugger</a>, <a href="https://simonwillison.net/tags/debugging">debugging</a>, <a href="https://simonwillison.net/tags/internet-explorer">internet-explorer</a>, <a href="https://simonwillison.net/tags/javascript">javascript</a></p>