Seeking to the end of a file is unreasonably slow

[kodnisse]

What steps will reproduce the bug?

1. Open a large file (~100k lines)
2. Seek to the end of the file with shift + G

What happens?

Seeking to the end of /var/log/pacman.log (94000 lines) using bat takes over 25 seconds on my machine.

What did you expect to happen instead?

Seeking to the end of the same file with less is immediate. I expect the same behavior from the bat pager.

How did you install bat?

sudo pacman -Syu bat

bat version and environment

Software version

bat 0.26.1 (v0.25.0-402-g979ba226)

Operating system

• OS: Linux (Arch Linux)
• Kernel: 7.0.14-zen1-1-zen

Command-line

bat /var/log/pacman.log --diagnostic 

Environment variables

BAT_CACHE_PATH=<not set>
BAT_CONFIG_PATH=<not set>
BAT_OPTS=<not set>
BAT_PAGER=<not set>
BAT_PAGING=<not set>
BAT_STYLE=<not set>
BAT_TABS=<not set>
BAT_THEME=<not set>
COLORTERM=truecolor
LANG=en_US.UTF-8
LC_ALL=<not set>
LESS=<not set>
MANPAGER=<not set>
NO_COLOR=<not set>
PAGER=<not set>
SHELL=/bin/bash
TERM=xterm-256color
XDG_CACHE_HOME=<not set>
XDG_CONFIG_HOME=<not set>

System Config file

Could not read contents of '/etc/bat/config': No such file or directory (os error 2).

Config file

--theme='OneHalfDark'

Custom assets metadata

Could not read contents of '/home/kodnisse/.cache/bat/metadata.yaml': No such file or directory (os error 2).

Custom assets

'/home/kodnisse/.cache/bat' not found

Compile time information

• Profile: release
• Target triple: x86_64-unknown-linux-gnu
• Family: unix
• OS: linux
• Architecture: x86_64
• Pointer width: 64
• Endian: little
• CPU features: fxsr,sse,sse2
• Host: x86_64-unknown-linux-gnu

Less version

> less --version 
less 704 (PCRE2 regular expressions)
Copyright (C) 1984-2026  Mark Nudelman

less comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the file named README in the less distribution.
Home page: https://greenwoodsoftware.com/less

[keith-hall]

this is a known problem, but there are currently no solutions - see the thread in #304

[kodnisse]

I see. It appears the syntax highlighting is at fault. Disabling colors made it magnitudes faster.

[Amilliox]

Root cause found: HashedEventRegister in output.rs was overriding all default minus bindings, registering only home/end. Search keys (/, ?, n, N) and navigation keys were not bound.

Fixed in PR #3836 by adding minus::input::generate_default_bindings() before custom bindings, then overriding only home/end.

[Amilliox]

Root cause: HashedEventRegister was overriding all default minus bindings. Fixed in PR #3837 by adding generate_default_bindings() before custom bindings.