vim-patch:7.4.2018

Problem:  buf_valid() can be slow when there are many buffers.
Solution: Add bufref_valid(), only go through the buffer list
          when a buffer was freed.

https://github.com/vim/vim/commit/b25f9a97e9aad3cbb4bc3fe87cdbd5700f8aa0c6

1 files changed, 4 insertions, 4 deletions

diff --git a/src/nvim/quickfix.c b/src/nvim/quickfix.c
index 7b22c95967..4e582108c5 100644
--- a/src/nvim/quickfix.c
+++ b/src/nvim/quickfix.c
@@ -1286,7 +1286,7 @@ void copy_loclist(win_T *from, win_T *to)
 // Looking up a buffer can be slow if there are many. Remember the last one to
 // make this a lot faster if there are multiple matches in the same file.
 static char_u *qf_last_bufname = NULL;
-static buf_T  *qf_last_buf = NULL;
+static bufref_T qf_last_bufref = { NULL, 0 };
 
 // Get buffer number for file "directory.fname".
 // Also sets the b_has_qf_entry flag.
@@ -1328,14 +1328,14 @@ static int qf_get_fnum(qf_info_T *qi, char_u *directory, char_u *fname)
 
   if (qf_last_bufname != NULL
       && STRCMP(bufname, qf_last_bufname) == 0
-      && buf_valid(qf_last_buf)) {
-    buf = qf_last_buf;
+      && bufref_valid(&qf_last_bufref)) {
+    buf = qf_last_bufref.br_buf;
     xfree(ptr);
   } else {
     xfree(qf_last_bufname);
     buf = buflist_new(bufname, NULL, (linenr_T)0, BLN_NOOPT);
     qf_last_bufname = (bufname == ptr) ? bufname : vim_strsave(bufname);
-    qf_last_buf = buf;
+    set_bufref(&qf_last_bufref, buf);
   }
   if (buf == NULL) {
     return 0;