Using alias leads to slow interaction

[jgarcdev]

Describe the bug: For user set aliases, when running them, there is a significant slowdown. For example, I have the bat program installed so I aliased it to cat. Similar for hexyl aliased to xxd. Running the original programs (hexyl, bat) run fine and smooth, but when running the aliases (cat, xxd), it becomes slow and typing is almost non-existent.

Expected behaviour: Using the alias should be the same as using the original program.

Screenshots: N/A

Platform (please complete the following information):

• OS, output from uname -a if supported: Linux [redacted] 6.6.87.2-microsoft-standard-WSL2 #1 SMP PREEMPT_DYNAMIC Thu Jun 5 18:30:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
• Terminal Emulator: Tabby, Rio, Fluent, Windows Terminal
• Murex version: 7.1.4143 (unknown)

Additional context I am using WSL 2 with Ubuntu LTS.

[lmorg]

I'm very confused by this because alias doesn't do anything that would affect performance. Even Murex's runtime still says the destination executable rather than the alias name. eg

» alias bob = sleep 200
» bg { bob }
» fid-list
    FID   Parent    Scope  State          Run Mode  BG   Out Pipe    Err Pipe    Command     Parameters
   9929     9928     9929  FunctionGroup  Default   yes                          bg
   9930     9929     9929  Executing      Default   yes  out         err         exec        sleep 200
  10004        0        0  Executing      Default   no   out         err         fid-list

^ you can see here that Murex doesn't see bob, but it does see `sleep.

I don't doubt what you're experiencing, but this is definitely a weird one.

As it happens, I do have a spare Windows machine lying around (mostly used to play Minecraft Bedrock with the kids haha) which I'm pretty sure does have Ubuntu LTS for WSL2 already set up. So I'll have a play, see if I can recreate your issue.

Thanks for the bug report