improve perf

diff --git a/system-status b/system-status
index 25a637ee9606788c97e22949b470a811428abf16..460d63be5c33385e03f580d03ecb41e5e9687132 100755 (executable)
--- a/system-status
+++ b/system-status
@@ -100,7 +100,13 @@ write-status() {
 
     ## check if last snapshot was within an hour
     vol=o
-    snaps=(/mnt/root/btrbk/$vol.20*)
+    # this section generally copied from btrbk scripts, but
+    # this part modified to speed things up by about half a second.
+    # I'm not sure if its quite as reliable, but it looks pretty safe.
+    # Profiled it using time and also adding to the top of the file:
+    # set -x
+    # PS4='+ $(date "+%2N") '
+    snaps=($(ls -1avdr /mnt/root/btrbk/$vol.20*|head -n1))
     now=$(date +%s)
     maxtime=0
     for s in ${snaps[@]}; do