perf(desktop): strip local symbols from the bundled macOS ONNX Runtime

[richiemcilroy]

What

Contents/Resources/onnxruntime/lib/libonnxruntime.dylib is Microsoft's release dylib, 35.2 MB, used on macOS by Parakeet transcription and as the camera-blur fallback when Apple Vision is unavailable. About 12.5 MB of it is local symbol tables that nothing in Cap reads.

setup.js now runs strip -x on it before re-signing (it already re-signs the dylib with Cap's identity for notarization). The cache marker changes with the preparation, so a cached unstripped copy is prepared again.

Evidence

Measured on the 0.6.1 release bundle's dylib (arm64, ONNX Runtime 1.24.2):

	Before	strip -x
Size	35.17 MB	22.68 MB
Exported symbols (nm -gU)	3	3 (identical list, incl. OrtGetApiBase)

-x removes local symbols only. The exported C API that ort resolves at load time is untouched.

CI (build-gpui, both macOS runners) gains "Test the prepared ONNX Runtime":

• it asserts OrtGetApiBase is still exported from the dylib setup.js prepared;
• it runs the previously ignored segmentation::tests::inference_runs_from_a_caller_with_a_tiny_stack, which loads the runtime and runs the bundled selfie-segmentation model three times.

scripts/setup.js is added to the gpui path filter so this runs whenever setup changes.

The FFmpeg dylibs in Spacedrive.framework were checked the same way; they are already stripped (strip -x saves 0 bytes).

Saves

~12.5 MB installed on Apple Silicon (the Intel 1.23.2 dylib is stripped by the same step). The updater archive and DMG shrink by the compressed size of those symbol tables.

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Project	Deployment	Actions	Updated
cap-status	Ready	Preview	Oct 20, 2026 12:42pm UTC

[capy-ai]

Capy found no issues.

View 2 other findings in Capy.