$ ./python-gc -c 'import asyncio,sys; sys._debugmallocstats()'

master:

# bytes in allocated blocks        =            4,011,368
# bytes in available blocks        =              136,640
50 unused pools * 4096 bytes       =              204,800
# bytes lost to pool headers       =               49,824
# bytes lost to quantization       =               53,816
# bytes lost to arena alignment    =                    0
Total                              =            4,456,448

patched:

# bytes in allocated blocks        =            3,852,432
# bytes in available blocks        =              132,664
27 unused pools * 4096 bytes       =              110,592
# bytes lost to pool headers       =               47,856
# bytes lost to quantization       =               50,760
# bytes lost to arena alignment    =                    0
Total                              =            4,194,304