microsoft/Terminal

[Performance] Replace std::vector with more lightweight structure in `RenderData::GetPatternId`

Ouverte

#10 564 ouverte le 6 juil. 2021

 (8 commentaires) (1 réaction) (0 personne assignée)C++ (9 275 forks)batch import
Area-PerformanceArea-RenderingHelp WantedIssue-TaskProduct-Meta

Métriques du dépôt

Stars
 (103 173 étoiles)
Métriques de merge PR
 (Métriques PR en attente)

Description

This is about the scrolling test in #10563. A simplified repro would be:

time bash -c 'yes | head -n1000000'

which takes 7-8s with windows terminal and 300ms with gnome terminal.

Test case provided by @lhecker.

These lines show up in the hot paths of the trace of OpenConsole:

https://github.com/microsoft/terminal/blob/main/src/renderer/base/renderer.cpp#L788

image

It appears that simply constructing empty std::vector (empty because this is in conhost/OpenConsole) is quite expensive.

CC @PankajBhojwani

Guide contributeur