localhost 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.

array.array vs list[int] vs bytes Lab

A hands-on Linux localhost lab comparing memory density and numeric throughput for list[int], array.array('i'), bytearray, and memoryview.

itertools vs Python loops Lab

Hands-on itertools vs pure Python loops lab: chain, islice, and accumulate vs equivalent for-loops with real ops/s, measured on Linux localhost (lab).

deque vs list in Python: Which Is Faster for a Queue?

Hands-on collections.deque vs list queue lab: real FIFO ops/s for append/popleft vs list.pop(0) at several prefill sizes on Linux localhost (eng lab).

struct.pack vs to_bytes vs memoryview Lab

Benchmarking fixed-record packing with struct.pack, Struct.pack_into, int.to_bytes, and memoryview on Linux localhost.

lru_cache hit vs miss: Cache Cost Lab

Real Linux localhost timings for functools.lru_cache hits, miss-and-insert calls, maxsize choices, and an uncached baseline.

logging vs print: Throughput Lab

Hands-on logging vs print throughput lab: real lines/s for StreamHandler, StringIO, and a disabled logger, measured on Linux localhost only (eng lab).

copy vs deepcopy vs manual: Shallow Copy Lab

Hands-on copy.copy vs deepcopy vs manual shallow lab: real ops/s on nested dicts and lists of several sizes, measured on Linux localhost only (eng lab).

string concat vs join vs StringIO: Build Lab

A hands-on localhost lab comparing +=, list+join, preallocated join, and StringIO for building strings at real sizes.