From: Vladimír Čunát <vladimir.cunat@nic.cz>
Date: Wed, 31 Jul 2019 13:55:43 +0000 (+0200)
Subject: modules/policy: optimize postrules
X-Git-Tag: v4.3.0~4^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40ea5f2ee0ace663af86d4be46c6d2acdcf92eb6;p=thirdparty%2Fknot-resolver.git

modules/policy: optimize postrules

I've never seen anyone use postrules.
---

diff --git a/modules/policy/policy.lua b/modules/policy/policy.lua
index cf6a0b738..d78e0f0ac 100644
--- a/modules/policy/policy.lua
+++ b/modules/policy/policy.lua
@@ -591,6 +591,8 @@ policy.layer = {
 		       state
 	end,
 	finish = function(state, req)
+		-- Optimization for the typical case
+		if #policy.postrules == 0 then return state end
 		-- Don't act on "resolved" cases.
 		if bit.band(state, bit.bor(kres.FAIL, kres.DONE)) ~= 0 then return state end
 		return policy.evaluate(policy.postrules, req, req:current(), state) or state