doc/python: add section about replaced/stubbed/avoided packages #336775

Evaluator Performance Report

stat	before	after	Δ	Δ%
cpuTime	764.26	768.49	↗ 4.23	0.55%
envs-bytes	23,713,506,608	23,713,506,608	0
envs-elements	1,257,663,552	1,257,663,552	0
envs-number	853,262,387	853,262,387	0
gc-heapSize	69,394,731,008	69,394,731,008	0
gc-totalBytes	146,484,510,432	146,484,510,736	↗ 304	0.00%
list-bytes	3,456,099,856	3,456,099,856	0
list-concats	90,444,947	90,444,947	0
list-elements	432,012,482	432,012,482	0
nrAvoided	988,534,071	988,534,071	0
nrFunctionCalls	783,226,108	783,226,108	0
nrLookups	410,974,256	410,974,256	0
nrOpUpdateValuesCopied	2,147,250,825	2,147,250,825	0
nrOpUpdates	98,757,652	98,757,652	0
nrPrimOpCalls	410,157,203	410,157,203	0
nrThunks	1,244,301,559	1,244,301,559	0
sets-bytes	48,655,486,464	48,655,486,464	0
sets-elements	2,857,164,953	2,857,164,953	0
sets-number	183,802,951	183,802,951	0
sizes-Attr	16	16	0
sizes-Bindings	16	16	0
sizes-Env	16	16	0
sizes-Value	24	24	0
symbols-bytes	3,149,718	3,149,718	0
symbols-number	184,618	184,618	0
values-bytes	38,112,358,176	38,112,358,176	0
values-number	1,588,014,924	1,588,014,924	0