--- old/make/bsd/makefiles/jsig.make	2019-07-09 12:01:01.075185230 +0200
+++ new/make/bsd/makefiles/jsig.make	2019-07-09 12:01:00.839184784 +0200
@@ -59,10 +59,15 @@
   JSIG_DEBUG_CFLAGS = -g
 endif
 
+# Optimize jsig lib at level -O3 unless it's a slowdebug build
+ifneq ($(DEBUG_LEVEL), slowdebug)
+  JSIG_OPT_FLAGS = $(OPT_CFLAGS)
+endif
+
 $(LIBJSIG): $(JSIGSRCDIR)/jsig.c $(LIBJSIG_MAPFILE)
 	@echo Making signal interposition lib...
 	$(QUIETLY) $(CC) $(SYMFLAG) $(ARCHFLAG) $(SHARED_FLAG) $(PICFLAG) \
-                         $(LFLAGS_JSIG) $(JSIG_DEBUG_CFLAGS) $(EXTRA_CFLAGS) -o $@ $<
+                         $(LFLAGS_JSIG) $(JSIG_DEBUG_CFLAGS) $(JSIG_OPT_FLAGS) $(EXTRA_CFLAGS) -o $@ $<
 ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
   ifeq ($(OS_VENDOR), Darwin)
 	$(DSYMUTIL) $@