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| author | Damien George <damien.p.george@gmail.com> | 2020-01-09 00:00:27 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2020-01-13 01:01:45 +1100 |
| commit | d96cfd13e3a464862cecffb2718c6286b52c77b0 (patch) | |
| tree | af399f8a18175155be1dfef08bc4ac51118b8bf8 /py/mpconfig.h | |
| parent | 6f0c83f6e186eb163c4209f211ab1c959d255e81 (diff) | |
py/obj: Add MICROPY_OBJ_IMMEDIATE_OBJS option to reduce code size.
This option (enabled by default for object representation A, B, C) makes
None/False/True objects immediate objects, ie they are no longer a concrete
object in ROM but are rather just values, eg None=0x6 for representation A.
Doing this saves a considerable amount of code size, due to these objects
being widely used:
bare-arm: -392 -0.591%
minimal x86: -252 -0.170% [incl +52(data)]
unix x64: -624 -0.125% [incl -128(data)]
unix nanbox: +0 +0.000%
stm32: -1940 -0.510% PYBV10
cc3200: -1216 -0.659%
esp8266: -404 -0.062% GENERIC
esp32: -732 -0.064% GENERIC[incl +48(data)]
nrf: -988 -0.675% pca10040
samd: -564 -0.556% ADAFRUIT_ITSYBITSY_M4_EXPRESS
Thanks go to @Jongy aka Yonatan Goldschmidt for the idea.
Diffstat (limited to 'py/mpconfig.h')
| -rw-r--r-- | py/mpconfig.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/py/mpconfig.h b/py/mpconfig.h index d4a9f3c50..5601cc2f7 100644 --- a/py/mpconfig.h +++ b/py/mpconfig.h @@ -113,6 +113,13 @@ #define MICROPY_OBJ_REPR (MICROPY_OBJ_REPR_A) #endif +// Whether to encode None/False/True as immediate objects instead of pointers to +// real objects. Reduces code size by a decent amount without hurting +// performance, for all representations except D on some architectures. +#ifndef MICROPY_OBJ_IMMEDIATE_OBJS +#define MICROPY_OBJ_IMMEDIATE_OBJS (MICROPY_OBJ_REPR != MICROPY_OBJ_REPR_D) +#endif + /*****************************************************************************/ /* Memory allocation policy */ |