Blog

mmap vs read Byte-Sum Scan: Localhost Lab

Hands-on mmap vs read vs chunked sequential byte-sum scan lab: real MB/s on a generated fixture (not page-touch), measured on Linux localhost for SREs.

ProcessPool vs Sequential CPU: Localhost Lab

Hands-on ProcessPoolExecutor vs sequential CPU lab: real wall time and worker sweep on pure-Python sum-of-squares, measured on Linux localhost for SREs.

pickle vs json: Round-trip Lab

Hands-on pickle vs json local round-trip lab: real throughput and size for modest dict/list payloads (trusted data), measured on Linux localhost (lab).

csv.reader vs split: Parse Lab

Hands-on csv.reader vs str.split vs DictReader lab: real rows/s on a quoted-field CSV fixture (pandas-free parse), measured on Linux localhost for SREs.

zip vs Index Pairing: Loop Lab

functools.partial vs lambda: Call Lab

statistics vs Manual mean: Stdlib Lab

Hands-on statistics vs manual mean/median/stdev lab: real ops/s for fmean, sum/len, and sorted mid versus the stdlib, measured on Linux localhost (lab).

bisect vs Linear vs set: Lookup Lab

Hands-on bisect.insort vs linear vs set lab: real ops/s for mixed sorted-list insert and membership lookup workloads, measured on Linux localhost (lab).

itertools.chain vs Flatten Lab

nlargest vs sorted[:k]: Top-k Lab

bytes vs bytearray: Mutate/Copy Lab

Hands-on bytes vs bytearray lab: real ops/s for append/extend/slice/copy and when copy dominates over mutate, benchmarked on Linux localhost for SREs.

frozenset vs set: Membership Lab

Hands-on frozenset vs set vs list membership lab: real ops/s for build-once lookup-heavy paths and dict keys, benchmarked on Linux localhost for SREs.