1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index f7d22c2..7b3a78f 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ CXX=clang++-7
 all: fft
 
 fft: fft.cpp
-	$(CXX) -Wall -std=c++17 -o $@ $^
+	$(CXX) -Wall -O2 -std=c++17 -o $@ $^
 
 install: