quickwit-oss/bitpacking

Have a light scalar implementation

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#20 opened on Sep 6, 2019

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Description

The current implementations generate large binaries because they have one specialized implementation for each bitwidth, and do loop unrolling.

Add a flag-enabled implementation that uses a more compact scalar implementation. This would be useful for web assembly for instance.

Contributor guide

Research direction
Examine the existing SIMD implementations and design a scalar fallback that can be enabled via a compile time flag. Focus on reducing code size by avoiding bitwidth specializations and loop unrolling.
Tech stack
rust
Domain
backendperformance
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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
RustSIMD concepts
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60