Latest stories from ShopperCove

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

attrgetter vs getattr: Hot Loop Lab

Hands-on operator.attrgetter vs builtin getattr lab: real ops/s for extract and sort by attribute versus direct access, measured on Linux localhost only.

Counter vs dict: Tally Lab

Hands-on collections.Counter vs dict tally lab: real ops/s for Counter.update, dict get-add, and defaultdict(int) token counting on Linux localhost (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.

Enum vs Constants: Access Cost Lab

contextlib vs try/finally: Cleanup Lab

itemgetter vs lambda: Sort Key Lab

Hands-on operator.itemgetter vs lambda sort-key lab: real ops/s for extract and list.sort on tuples, dicts, and objects, measured on Linux localhost (lab).

ThreadPoolExecutor vs Sequential: I/O Lab

Hands-on ThreadPoolExecutor vs sequential lab: real wall-time speedup for I/O sleep workloads plus GIL CPU contrast, measured on Linux localhost (lab).

perf_counter vs time.time: Which Python Timer to Use?

A hands-on Linux localhost lab measuring Python clock-call overhead, observed resolution, and safe choices for elapsed-time measurements.