tikv/tikv

Align key memory location

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#3,486 opened on Aug 20, 2018

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 (1 comment) (0 reactions) (0 assignees)Rust (2,189 forks)batch import
component/performancedifficulty/mediumhelp wanted

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Description

Feature Request

After encoding, our keys are 9*N in length (or 9*N+8 if it has timestamp suffix).

when comparing key equality, or decoding key timestamp, we access its last 8*N part, which is not memory aligned in most cases. Make keys ends with a memory aligned location could improve performance.

Contributor guide

Research direction
Analyze the key encoding structure and identify where alignment can be improved. Consider adding padding or reordering fields to ensure the last 8*N part is aligned.
Tech stack
rust
Domain
database
Issue type
Feature
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.
1-3 hours
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
RustGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65