sharkdp/diskus

diskus slower than du

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#38 opened on Oct 29, 2019

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bugenhancementgood first issuehelp wanted

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Description

Maybe I were doing it wrong. The computed directory is my clippy build.

% /usr/bin/du -sch
4.5G    .
4.5G    total
% diskus
4.73 GB (4,727,521,280 bytes)
% hyperfine diskus '/usr/bin/du -sch'
Benchmark #1: diskus
  Time (mean ± σ):     115.8 ms ±  28.6 ms    [User: 2.601 s, System: 0.592 s]
  Range (min … max):    69.1 ms … 156.9 ms    19 runs

Benchmark #2: /usr/bin/du -sch
  Time (mean ± σ):      22.8 ms ±   2.8 ms    [User: 5.5 ms, System: 17.4 ms]
  Range (min … max):    14.2 ms …  26.9 ms    163 runs

Summary
  '/usr/bin/du -sch' ran
    5.07 ± 1.40 times faster than 'diskus'

Meta

  • diskus: b2e4cf9 but with cargo update

Contributor guide

Research direction
Profile diskus to identify bottlenecks compared to du. Check if parallelization is causing overhead for small directories and investigate the use of syscalls.
Tech stack
rust
Domain
cliperformance
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65