From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 23 Nov 2014 18:25:39 +0000 (+0100)
Subject: jshn: improve performance by using let instead of $(( ))
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Flibubox.git;a=commitdiff_plain;h=d5d384b0ba390b39fdca07919f3e3831afc712c2;ds=sidebyside

jshn: improve performance by using let instead of $(( ))

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---

diff --git a/sh/jshn.sh b/sh/jshn.sh
index 5db1667..f5cf1d2 100644
--- a/sh/jshn.sh
+++ b/sh/jshn.sh
@@ -42,7 +42,7 @@ _json_inc() {
 	# var=$1
 	# dest=$2
 
-	eval "${JSON_PREFIX}$1=\$(( \${${JSON_PREFIX}$1:-0} + 1))${2:+; $2=\"\$${JSON_PREFIX}$1\"}"
+	let "${JSON_PREFIX}$1 += 1" "$2 = ${JSON_PREFIX}$1"
 }
 
 _json_add_generic() {