September 2025 monthly performance summary for emscripten-core/emscripten. Focused on keeping core ports up-to-date and stabilizing input handling in SDL3 port to ensure reliable builds and runtime behavior across browsers. Key features delivered: - Ogg and Vorbis ports updated to 1.3.5/1.3.7. Updated version tags, download URLs, and hashes in build scripts; replaced outdated 2015 code to improve compatibility and potential performance. - Commit: 3004076e17cbbc155ee42e522a6c373e5f1ee462 (Update Vorbis and Ogg ports (#25274)) - SDL3 Port: fixed duplicate SDL_EVENT_KEY_DOWN events; ensured port remains at 3.2.22 with stabilized input handling; updated porting script references. - Commit: 06e0cf6dc8caf696e33de98bc24452c1242beb78 (Update SDL3 port to version 3.2.22 (#25273)) Major bugs fixed: - Resolved duplicate SDL_EVENT_KEY_DOWN events in the SDL3 port, reducing noisy input events and improving reliability for user interactions in WebAssembly/browser targets. Overall impact and accomplishments: - Maintained alignment of emscripten ports with current codecs and input subsystems, reducing build breaks and runtime inconsistencies. - Improved browser runtime stability for SDL-based applications by removing duplicated input events and ensuring SDL3 port compatibility. - Demonstrated disciplined dependency maintenance with targeted updates to build scripts and porting logic, minimizing risk to downstream builds. Technologies/skills demonstrated: - Dependency/version management, port maintenance, and build script updates. - Cross-platform compatibility considerations for WebAssembly/browser environments. - Debugging and stabilization of input event handling in SDL-based ports.

Month: 2025-05. In shadps4-emu/ext-SDL, delivered a critical stability fix addressing thread-safety in Emscripten-based UI and Audio paths for web deployments. Proxying Emscripten_GetSystemTheme and EMSCRIPTENAUDIO_OpenDevice calls to the browser's main thread resolved race conditions affecting UI preferences and audio context access. This work ensures more reliable web builds and a smoother user experience for web users.

January 2025 monthly summary focusing on key accomplishments and business impact. The team delivered a backend feature to support negative image ratings for assets marked as rejected, expanded rating validation to range -1 to 5, and added tests to ensure reliability and prevent regressions. This enhances moderation workflows, improves data integrity, and delivers measurable business value through more accurate asset evaluation.