Benchmarking fixed-record packing with struct.pack, Struct.pack_into, int.to_bytes, and memoryview on Linux localhost.
Real Linux localhost timings for functools.lru_cache hits, miss-and-insert calls, maxsize choices, and an uncached baseline.
A hands-on localhost lab comparing +=, list+join, preallocated join, and StringIO for building strings at real sizes.
A hands-on localhost lab measuring set, frozenset, list, and dict-key membership across N, with the real crossover point.
Hands-on tempfile modes lab: TemporaryFile vs NamedTemporaryFile delete True/False vs mkstemp unlink patterns with real measured ops/s on localhost box.
Hands-on Python dataclass vs slots vs dict lab: instantiation and attribute ops/s plus RSS for classic, slots, dataclass, namedtuple, dict on localhost.
Hands-on Python re vs str methods lab on a 32MiB localhost corpus: count, find, line prefix, case-insensitive, and email scans with real measured MB/s.
Hands-on posix_fadvise SEQUENTIAL vs RANDOM vs NORMAL lab on localhost: cold and warm 256MiB reads after drop_caches with real measured p50 MB/s and RPS.
Hands-on SHA-256 vs BLAKE2b vs xxHash hash throughput on 64MiB buffers (SHA-1/SHA3 labeled). Real MB/s with OpenSSL and xxHash versions on the lab box.
Hands-on SQLite WAL vs DELETE vs OFF journal_mode lab: insert/update RPS (FULL/NORMAL sync), plus WAL checkpoint cost. Real p50 numbers on localhost box.
Hands-on zstd vs gzip vs lz4 on 64MiB payloads (real /usr text, mixed, urandom). Measured compress/decompress MB/s and ratio at default levels. No Docker.
Hands-on fsync vs fdatasync vs none: per-write and every-N sync on 256B and 4KiB records. Real p50/p95 show about 100-200x durability tax on localhost