Make 'stop' value default to 0

This is done because we want buffering, which increases performance quite a lot,
by default. But buffering means that we can't count matches, thus we disable
buffering when a stop value greater than 0 is used.

Author: mhinz

doc/grepper.txt

@@ -278,7 +278,7 @@ The prompt uses this mapping to toggle the |:Grepper-side| flag.
 
 ------------------------------------------------------------------------------
                                                                 *g:grepper.stop*  >
-    let g:grepper.stop = 5000
+    let g:grepper.stop = 0
 <
 This limits the number of matches for asynchronous searches. Thus, the grep
 tool is terminated early when the given number is reached. All present matches
@@ -288,6 +288,10 @@ Chances are, if you have more than 5000 matches, you executed Grepper in a
 place with too many subdirectories or your search query was too general or
 both. This limits the impact of otherwise long-running processes.
 
+NOTE: Any value greater than 0 automatically disables buffering and therefore
+reduces performance a bit. It is recommended not to set this, but to use
+|:Grepper-stop| on demand, instead.
+
 ------------------------------------------------------------------------------
                                                               *g:grepper.append*  >
     let g:grepper.append = 0

plugin/grepper.vim

@@ -29,7 +29,7 @@ let s:defaults = {
       \ 'searchreg':     0,
       \ 'side':          0,
       \ 'side_cmd':      'vnew',
-      \ 'stop':          5000,
+      \ 'stop':          0,
       \ 'dir':           'cwd',
       \ 'prompt_mapping_tool': '<tab>',
       \ 'prompt_mapping_dir':  '<c-d>',
@@ -931,14 +931,17 @@ function! s:run(flags)
     if exists('s:id')
       silent! call jobstop(s:id)
     endif
+    let opts = {
+          \ 'on_stdout': function('s:on_stdout_nvim'),
+          \ 'on_stderr': function('s:on_stdout_nvim'),
+          \ 'on_exit':   function('s:on_exit'),
+          \ }
+    if !a:flags.stop
+      let opts.stdout_buffered = 1
+      let opts.stderr_buffered = 1
+    endif
     try
-      let s:id = jobstart(cmd, extend(options, {
-            \ 'on_stdout': function('s:on_stdout_nvim'),
-            \ 'on_stderr': function('s:on_stdout_nvim'),
-            \ 'stdout_buffered': 1,
-            \ 'stderr_buffered': 1,
-            \ 'on_exit':   function('s:on_exit'),
-            \ }))
+      let s:id = jobstart(cmd, extend(options, opts))
     finally
       call s:chdir_pop(orig_dir)
     endtry