emscripten-core/emscripten
Mar 2026 – Mar 2026
1 Month active
Languages Used
CPython
Technical Skills
C programmingPython scriptingTesting
Thibault Saunier
PROFILE
Thibault Saunier
Worked on the emscripten-core/emscripten project to address stability and performance issues related to function pointer casting in C and Python environments. Reordered the EMULATE_FUNCTION_POINTER_CASTS pass to execute before optimization, preventing crashes from type-mismatched indirect calls and improving build robustness. Added a regression test to ensure ongoing stability and moved the fpcast-emu block outside the -O2 optimization path, enabling reliability in both optimized and non-optimized builds. Real-world testing on a GStreamer workload demonstrated a 1.8% reduction in WebAssembly size and nearly double execution speed, highlighting the effectiveness of the fix and the developer’s focus on thorough testing.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
39
Activity Months1
Your Network
115 peopleWork History
March 2026
1 Commits
Mar 1, 2026In March 2026, delivered a stability and performance improvement for the emscripten project (emscripten-core/emscripten). Reordered the EMULATE_FUNCTION_POINTER_CASTS (fpcast-emu) pass to run before optimization passes to prevent crashes caused by type-mismatched indirect calls, with a regression test added to guard against future regressions. The change also moves the fpcast-emu block outside the -O2/optimizing path so it runs in non-optimized builds, improving reliability across configurations. Real-world measurements on a GStreamer workload show approximately 1.8% wasm size reduction (5.30MB vs 5.40MB) and a near 2x speedup, validating both stability and performance gains. This work reduces the crash surface for common idioms like calling a 1-arg function through a 2-arg pointer (e.g., patterns in GLib) and strengthens overall build robustness for downstream projects.
1 Commits
Mar 1, 2026In March 2026, delivered a stability and performance improvement for the emscripten project (emscripten-core/emscripten). Reordered the EMULATE_FUNCTION_POINTER_CASTS (fpcast-emu) pass to run before optimization passes to prevent crashes caused by type-mismatched indirect calls, with a regression test added to guard against future regressions. The change also moves the fpcast-emu block outside the -O2/optimizing path so it runs in non-optimized builds, improving reliability across configurations. Real-world measurements on a GStreamer workload show approximately 1.8% wasm size reduction (5.30MB vs 5.40MB) and a near 2x speedup, validating both stability and performance gains. This work reduces the crash surface for common idioms like calling a 1-arg function through a 2-arg pointer (e.g., patterns in GLib) and strengthens overall build robustness for downstream projects.
March 2026
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Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
CPython
Technical Skills
C programmingPython scriptingTesting
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