Topic

sre

111 posts

set vs frozenset vs list: Membership Lookup Lab

A hands-on localhost lab measuring set, frozenset, list, and dict-key membership across N, with the real crossover point.

1 Oct 20265 min read

pathlib vs os.path in Python: Is pathlib Slower? Tested

A hands-on Linux localhost benchmark of pathlib and os.path for joins, filesystem checks, stats, and recursive scans.

1 Oct 20266 min read

sorted vs heapq vs bisect: Which Is Fastest?

A hands-on Linux localhost benchmark comparing batch sorting, bisect.insort, and heapq as ordered data arrives.

1 Oct 20265 min read

TemporaryFile vs NamedTemporaryFile Delete Modes Lab

Hands-on tempfile modes lab: TemporaryFile vs NamedTemporaryFile delete True/False vs mkstemp unlink patterns with real measured ops/s on localhost box.

1 Oct 20266 min read

dataclass vs slots vs dict: Python Object Lab

Hands-on Python dataclass vs slots vs dict lab: instantiation and attribute ops/s plus RSS for classic, slots, dataclass, namedtuple, dict on localhost.

1 Oct 20266 min read

getaddrinfo DNS Resolve Cost Localhost Lab

Hands-on getaddrinfo cost lab: localhost vs numeric IP vs AI_NUMERICHOST, plus hosts/stub names with real p50/p95 µs. DNS sinkhole labeled honestly here.

1 Oct 20266 min read

Atomic Rename vs Overwrite: Is os.replace Worth the Cost?

Hands-on atomic rename vs overwrite lab: tempfile+os.replace vs truncate-write with/without fsync. Real ops/s on localhost; crash-safety limits labeled.

1 Oct 20267 min read

uuid4 vs secrets Token Generation Rate Lab

Hands-on uuid.uuid4 vs secrets.token_hex/urlsafe vs os.urandom ops/s on localhost. Throughput only; uniqueness and collisions not measured in this lab.

1 Oct 20266 min read

base64 vs hex Encode/Decode Throughput Lab

Hands-on base64 vs hex encode/decode lab on 32MiB buffers with real MB/s measurements in both directions on localhost.

1 Oct 20266 min read

Python re vs str Methods: Text Scan Throughput Lab

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.

1 Oct 20266 min read

posix_fadvise SEQUENTIAL vs RANDOM: Read Hint Lab

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.

1 Oct 20266 min read

fork COW RSS vs spawn: Python Multiprocessing Lab

Hands-on fork COW vs multiprocessing spawn lab: PSS/Private_Dirty after fork and page dirtying, plus spawn start latency. Real numbers on the lab box.

1 Oct 20266 min read