Emit codegen lock waiting time in compilation traces#257
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- Add control for recording wait time to Julia mutexes - Enable this control for the codegen lock - Record the codegen lock waiting time in `jl_generate_fptr` when called from `jl_compile_method_internal` - Emit the codegen lock waiting time as well as the codegen lock nesting level in compilation traces
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Nov 5, 2025
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PR Description
This PR adds instrumentation when tracing the functions compiled, emitted as part of the output of the precompile statements. The instrumentation is represented as JSON object inside a julia comment, in the same line of the associated precompile statement. It provides the time, in milliseconds, spent waiting for the codegen lock, and whether the same function has been compiled multiple times in nested calls.
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