zsh: functions: cleanup tracing functions

functions/tracing.zsh

@@ -3,9 +3,10 @@
 function start_tracing {
 	zmodload zsh/zprof
 	zmodload zsh/datetime
+
 	setopt PROMPT_SUBST
 	PS4+='+$EPOCHREALTIME %N:%i> '
-	logfile=$(mktemp zsh_profile.XXXXXXXX)
+	logfile=$(mktemp --tmpdir zsh_profile.XXXXXXXX)
 	echo "logging to $logfile"
 	exec 3>&2 2>$logfile
 	setopt XTRACE
@@ -14,5 +15,8 @@ function start_tracing {
 function stop_tracing {
 	unsetopt XTRACE
 	exec 2>&3 3>&-
-	zprof | tee zprof_out.log | vimscratch -
+	zprof | tee zprof_out.log | vim -c "set buftype=nofile" -
+
+    zmodload -u zsh/zprof
+    zmodload -u zsh/datetime
 }