Add selective collect to memory allocations #10264
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I have this branch with debugging prints and checks: https://github.com/tannewt/circuitpython/tree/debug_gc_selective_collect |
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Hopefully #10269 will make enough space for this. |
By selectively collecting an allocation, we can skip scanning many allocations for pointers because we know up front they won't have them. This helps a ton when large buffers are being used and memory is slow (PSRAM). In one Fruit Jam example GC times drop from 80+ms to ~25ms. The example uses a number of bitmaps that are now no longer scanned.
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By selectively collecting an allocation, we can skip scanning many allocations for pointers because we know up front they won't have them. This helps a ton when large buffers are being used and memory is slow (PSRAM). In one Fruit Jam example GC times drop from 80+ms to ~25ms. The example uses a number of bitmaps that are now no longer scanned.