PERF: fix performance regression in memory_usage(deep=True) for object dtype#33102

Merged

mroeschke merged 2 commits intopandas-dev:masterfrom

neilkg:perf-regression-mem-usage

Mar 31, 2020

Commits on Mar 28, 2020

updated to _values and added ASV
neilkg
committed

Commits on Mar 30, 2020

Merge remote-tracking branch 'upstream/master' into perf-regression-mem-usage
neilkg
committed