From 6148d8ed1bf293bb3f1f2d03754ca37fb5e6823a Mon Sep 17 00:00:00 2001
From: Wesley Shillingford <wezrule@hotmail.com>
Date: Sat, 13 Jul 2019 14:48:15 +0100
Subject: [PATCH] Improve docker build speed on multicore machines (#2148)

---
 docker/node/Dockerfile | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/docker/node/Dockerfile b/docker/node/Dockerfile
index 8ac8e76f..27014275 100644
--- a/docker/node/Dockerfile
+++ b/docker/node/Dockerfile
@@ -3,11 +3,13 @@ FROM nanocurrency/nano-env:gcc
 ARG NETWORK=live
 ADD ./ /tmp/src
 
+RUN num_cores=$(($(grep -c ^processor /proc/cpuinfo) + 1))
+
 RUN mkdir /tmp/build && \
     cd /tmp/build && \
     cmake /tmp/src -DBOOST_ROOT=${BOOST_ROOT} -DACTIVE_NETWORK=nano_${NETWORK}_network && \
-    make nano_node && \
-    make nano_rpc && \
+    make nano_node -j $num_cores && \
+    make nano_rpc -j $num_cores && \
     cd .. && \
     echo ${NETWORK} > /etc/nano-network