Archive
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.
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).
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.
Hands-on hashlib md5 vs blake2b vs sha1/sha256 lab: real MB/s checksum throughput for content-integrity hashing, measured on Linux localhost for SREs.
Hands-on glob.glob vs Path.rglob vs os.walk lab: real files/s for recursive file listing on a modest fixture tree, measured on Linux localhost for SREs.
Hands-on json.dumps separators vs indent lab: real time and byte-size tradeoffs for compact vs pretty JSON encoding, measured on Linux localhost (lab).
Hands-on shutil.copyfile vs manual file copy lab: real MB/s versus open/read/write and Path.read_bytes on local disk, measured on Linux localhost (lab).
Hands-on str.translate vs replace vs re.sub lab: real ops/s for character delete and map scrubbing on mid-size strings, measured on Linux localhost (lab).
Hands-on setdefault vs if-not-in vs defaultdict lab: real ops/s for list-append and counter default insert patterns, measured on Linux localhost (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).