golang/go

cmd/compile: mod operator is very slow on intel hardware with int64

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#59,089 opened on Mar 17, 2023

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Description

What version of Go are you using (go version)?

Does this issue reproduce with the latest release?

Yes

What did you do?

Mod operator is very slow on intel hardware when used on int type.

What did you expect to see?

Mod operator optimized to handle int types on intel hardwares

What did you see instead?

The mod operator is very slow when used on int types on intel hardware.

Contributor guide

Research direction
Investigate the current implementation of the mod operator for int64 in the Go compiler on Intel architecture, and identify if it uses a generic division or a faster algorithm.
Tech stack
go
Domain
backend
Issue type
Bug
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.
1-2 days
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
Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
25