From ef1c2d06156ff7c67506387d677816fd37c3d9be Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Drwi=C4=99ga?= <tomusdrw@users.noreply.github.com>
Date: Sat, 25 Apr 2020 14:01:21 +0200
Subject: [PATCH] Compute weight only once. (#5780)

---
 substrate/frame/support/src/dispatch.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/substrate/frame/support/src/dispatch.rs b/substrate/frame/support/src/dispatch.rs
index 4e98d9a316..081574726a 100644
--- a/substrate/frame/support/src/dispatch.rs
+++ b/substrate/frame/support/src/dispatch.rs
@@ -1433,16 +1433,17 @@ macro_rules! decl_module {
 				match *self {
 					$(
 						$call_type::$fn_name( $( ref $param_name ),* ) => {
+							let base_weight = $weight;
 							let weight = <dyn $crate::dispatch::WeighData<( $( & $param, )* )>>::weigh_data(
-								&$weight,
+								&base_weight,
 								($( $param_name, )*)
 							);
 							let class = <dyn $crate::dispatch::ClassifyDispatch<( $( & $param, )* )>>::classify_dispatch(
-								&$weight,
+								&base_weight,
 								($( $param_name, )*)
 							);
 							let pays_fee = <dyn $crate::dispatch::PaysFee<( $( & $param, )* )>>::pays_fee(
-								&$weight,
+								&base_weight,
 								($( $param_name, )*)
 							);
 							$crate::dispatch::DispatchInfo {