commit 6e5a9f948221b52caaaf106079cb3430c4dd7c77
author Federico Mengozzi <19249682+fedemengo@users.noreply.github.com> Mon Apr 17 22:31:38 2023 +0100
committer Bram Moolenaar <Bram@vim.org> Mon Apr 17 22:31:38 2023 +0100
tree e22fbc7d41e12e87de97afdaff9dc24f34f04ad5
parent 4c42c7eef43ff0f58fa574f7a900c8a3313f372e

patch 9.0.1464: strace filetype detection is expensive

Problem:    Strace filetype detection is expensive.
Solution:   Match with a cheap pattern first. (Federico Mengozzi,
            closes #12220)

runtime/autoload/dist/script.vim

diff --git a/runtime/autoload/dist/script.vim b/runtime/autoload/dist/script.vim
index f86c428..e95c633 100644
--- a/runtime/autoload/dist/script.vim
+++ b/runtime/autoload/dist/script.vim
@@ -338,7 +338,9 @@
     set ft=virata
 
     # Strace
-  elseif line1 =~ '[0-9:.]* *execve(' || line1 =~ '^__libc_start_main'
+    # inaccurate fast match first, then use accurate slow match
+  elseif (line1 =~ 'execve(' && line1 =~ '^[0-9:.]* *execve(')
+	   || line1 =~ '^__libc_start_main'
     set ft=strace
 
     # VSE JCL