Menu

All writing Blog Topics Categories About RSS

Categories

Observability & SRE62 All categories

Topics

sre111 localhost lab102 performance70 python58 javascript47 bundle size36 benchmarking35 node.js35 web development21 typescript19 benchmark16 content creation15 All topics

Topic

defaultdict list

1 post

Loading posts…

ShopperCove

Hands-on notes on developer tools, written after the tool has actually been run.

All writing Blog Categories Topics About Privacy RSS

© 2026 ShopperCove

groupby vs Manual Group: Localhost Lab

Hands-on itertools.groupby vs manual dict-of-lists: real records/s grouping pre-sorted key runs, measured on Linux localhost today in this lab for SREs.

1 Oct 20264 min read