Enable Python bytecode compilation during build to reduce cold-start time#68
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Enable Python bytecode compilation during build to reduce cold-start time#68
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Add UV_COMPILE_BYTECODE=1 to compile Python source to bytecode during install. This reduces agent cold-start time at the expense of a slightly longer build. Mirrors livekit/web#4070.
Topherhindman
approved these changes
Apr 30, 2026
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Summary
This change enables Python bytecode compilation during the Docker build process to improve agent cold-start performance by pre-compiling Python source files to
.pycformat.Key Changes
UV_COMPILE_BYTECODE=1environment variable to the base Docker stageuvpackage manager to compile all Python source code to bytecode during dependency installationImplementation Details
By pre-compiling Python source to bytecode during the build phase, the first import of Python modules no longer incurs the compilation cost at runtime. This reduces cold-start latency for the agent, though it comes at the trade-off of a slightly longer build time. The bytecode compilation happens once during image build rather than on every container startup.
https://claude.ai/code/session_01Noyea9Jyi7sgN1ctUhpZJf