commit https://github.com/vim/vim/commit/e0ab94e7123ca7855f45919114d948ef2bc1e8c3 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Sep 4 19:50:54 2016 +0200 patch 7.4.2324 Problem: Crash when editing a new buffer and BufUnload autocommand wipes out the new buffer. (Norio Takagi) Solution: Don't allow wiping out this buffer. (partly by Hirohito Higashi) Move old style test13 into test_autocmd. Avoid ml_get error when editing a file.

"Test for benchmarking the RE engine

so small.vim
if !has("reltime") | finish | endif
func! Measure(file, pattern, arg)
	for re in range(3)
	    let sstart=reltime()
	    let cmd=printf("../vim -u NONE -N --cmd ':set re=%d'".
		\ " -c 'call search(\"%s\", \"\", \"\", 10000)' -c ':q!' %s", re, escape(a:pattern, '\\'), empty(a:arg) ? '' : a:arg)
	    call system(cmd. ' '. a:file)
	    $put =printf('file: %s, re: %d, time: %s', a:file, re, reltimestr(reltime(sstart)))
	endfor
endfunc