sre

Decimal vs float Sum: Localhost Lab

Hands-on Decimal vs float cumulative sum lab: real ops/s plus a simple accuracy note (not financial advice), measured on Linux localhost (lab) for SREs.

threading.local vs tid-dict: Localhost Lab

Hands-on threading.local vs tid-keyed dict vs module-global lab: real ops/s for per-thread state access patterns, measured on Linux localhost for SREs.

Event vs Condition vs Barrier: Localhost Lab

asyncio TaskGroup vs gather: Speed and Exception Handling

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.

rglob vs glob: Which Is Faster in Python?

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.

json.dumps Compact vs Indent Lab

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).

shutil.copyfile vs Manual Copy 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).

str.translate vs replace: Scrub 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).