Index: benchmark/io/http/Makefile.am
===================================================================
--- benchmark/io/http/Makefile.am	(revision 1e8b4b496fa22c8d23cd2e56daf4a03858942353)
+++ benchmark/io/http/Makefile.am	(revision 753fb9784c694cd9fc5f0a571f03237cf5351f17)
@@ -21,5 +21,5 @@
 include $(top_srcdir)/tools/build/cfa.make
 
-AM_CFLAGS = -O2 -Wall -Wextra -I$(srcdir) -lrt -pthread # -Werror
+AM_CFLAGS = -O3 -Wall -Wextra -I$(srcdir) -lrt -pthread # -Werror
 AM_CFAFLAGS = -quiet -nodebug
 AM_LDFLAGS = -quiet -nodebug