PERF: perform reductions block-wise#29847

Merged

jreback merged 15 commits intopandas-dev:masterfrom

jbrockmendel:perf-reduce

Jan 1, 2020

Commits on Nov 25, 2019

Commits on Nov 26, 2019

Commits on Nov 27, 2019

Merge branch 'master' of https://github.com/pandas-dev/pandas into perf-reduce
jbrockmendel
committed

Commits on Dec 8, 2019

Merge branch 'master' of https://github.com/pandas-dev/pandas into perf-reduce
jbrockmendel
committed

Commits on Dec 20, 2019

Merge branch 'master' of https://github.com/pandas-dev/pandas into perf-reduce
jbrockmendel
committed

Commits on Dec 22, 2019

Commits on Dec 26, 2019

'Merge branch 'master' of https://github.com/pandas-dev/pandas into perf-reduce
jbrockmendel
committed

Commits on Dec 27, 2019