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Diffstat (limited to 'docs/reference')
| -rw-r--r-- | docs/reference/speed_python.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/reference/speed_python.rst b/docs/reference/speed_python.rst index 64fd9df6c..9360fd610 100644 --- a/docs/reference/speed_python.rst +++ b/docs/reference/speed_python.rst @@ -246,6 +246,13 @@ There are certain limitations in the current implementation of the native code e * Context managers are not supported (the ``with`` statement). * Generators are not supported. * If ``raise`` is used an argument must be supplied. +* The background scheduler (see `micropython.schedule`) is not run during + execution of native code. +* On targets with thrteading and the GIL, the GIL is not released during + execution of native code. + +To mitigate the last two points, long running native functions should call +``time.sleep(0)`` periodically, which will run the scheduler and bounce the GIL. The trade-off for the improved performance (roughly twice as fast as bytecode) is an increase in compiled code size. |