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perf(node): the Node shell runs at half the Python shell's throughput

Abierto
  • ¿Algo no está bien?
#962 0 comentarios 0 reacciones 0 asignados Ver en GitHub

Los mantenedores suelen responder en 1 día

Nadie ha tomado este issue todavía.

Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
48/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
nodejs, python, redis, rust
Área
backend, performance

Línea de trabajo

Start by profiling one job through the Node shell in crates/flexiq-node and sdks/node, then compare its path with the Python shell for the same scenario. Check the napi boundary, codec defaults, concurrency semantics, and per-job versus per-batch work, using the benchmark comparison as the first measurement. Done means the throughput gap is explained; fix it with a regression test if it is a shell bug, or update the Node benchmark concurrency_model if the semantics differ.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

enhancement node P2 rust

Epic: #958

Why

Same core, same backend, same scenario, same machine, same run:

entrant enqueue/s completed/s p50 p99
flexiq-redis (Python) 8.1 2.1 6839 ms 8946 ms
flexiq-node-redis (Node) 7.5 1.1 9800 ms 19012 ms

Roughly half the throughput and double the tail, against the same Rust code and the same Redis.
Whatever that is, it is in the shell — crates/flexiq-node or sdks/node — not in the storage
layer both shells share, and it is therefore likely to be both cheap to find and independent of
everything else under #958.

The SQLite rows show the same sign with a much smaller magnitude, which is consistent with a
fixed per-job overhead that only becomes visible once each job is already expensive.

Shape

Profile one job end to end through the Node shell and compare the work done against the Python
shell's path for the same job. Candidates worth ruling in or out first, cheapest before
deepest:

  • an extra hop per job in the napi boundary — the Rust to JS to Rust callback is a
    ThreadsafeFunction plus Promise<Buffer> over a tokio::oneshot
  • serialization: the two shells do not default to the same codec
  • concurrency semantics — concurrency: 4 in the Node worker against workers=4 threads in
    Python is the same number and not necessarily the same amount of parallelism in flight
  • anything per job that is per batch on the Python side

Done when

  • the gap is explained, whether or not it is fixed in this issue
  • if it is a shell bug, it is fixed and a regression test covers it
  • if it is a semantic difference in what concurrency means, the benchmark's
    concurrency_model string for the Node entrant says so, because that field exists to stop
    exactly this kind of comparison being silently wrong
Lenguaje dominante
Rust
Estrellas
20
Forks
2
Merge medio
10 h 50 min
PR fusionados (30 d)
61

Preparar el entorno

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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