diff --git a/Makefile b/Makefile
index 84a3210..6f25fb9 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ ifneq ($(strip $(COV_TEST)),)
 endif
 
 CC ?= gcc
-CFLAGS ?=-Wall -DLIBPCRE -g $(CFLAGS_COV) $(CFLAGS_SAN)
+CFLAGS ?=-Wall -O2 -DLIBPCRE -g $(CFLAGS_COV) $(CFLAGS_SAN)
 
 LIBS=-lm -lpcre2-8
 OBJS=sslh-conf.o common.o log.o sslh-main.o probe.o tls.o argtable3.o collection.o gap.o tcp-probe.o
diff --git a/gap.c b/gap.c
index 6b96a89..a0adfbc 100644
--- a/gap.c
+++ b/gap.c
@@ -31,11 +31,6 @@
 #include "gap.h"
 
 
-typedef struct gap_array {
-    int len; /* Number of elements in array */
-    void** array;
-} gap_array;
-
 /* Allocate one page-worth of elements */
 static int gap_len_alloc(int elem_size)
 {
@@ -61,12 +56,7 @@ gap_array* gap_init(int len)
     return gap;
 }
 
-void* gap_get(gap_array* gap, int index)
-{
-    return gap->array[index];
-}
-
-static int gap_extend(gap_array* gap)
+int gap_extend(gap_array* gap)
 {
     int elem_size = sizeof(gap->array[0]);
     int new_length = gap->len + gap_len_alloc(elem_size);
@@ -84,17 +74,6 @@ static int gap_extend(gap_array* gap)
     return 0;
 }
 
-int gap_set(gap_array* gap, int index, void* ptr)
-{
-    while (index >= gap->len) {
-        int res = gap_extend(gap);
-        if (res == -1) return -1;
-    }
-
-    gap->array[index] = ptr;
-    return 0;
-}
-
 void gap_destroy(gap_array* gap) 
 {
     free(gap->array);
diff --git a/gap.h b/gap.h
index 3ba5ead..be41375 100644
--- a/gap.h
+++ b/gap.h
@@ -4,10 +4,35 @@
 typedef struct gap_array gap_array;
 
 gap_array* gap_init(int len);
-void* gap_get(gap_array* gap, int index);
-int gap_set(gap_array* gap, int index, void* ptr);
+static void* gap_get(gap_array* gap, int index);
+static int gap_set(gap_array* gap, int index, void* ptr);
 void gap_destroy(gap_array* gap);
 
 int gap_remove_ptr(gap_array* gap, void* ptr, int len);
 
+/* Private declarations to allow inlining.
+ * Don't assume my implementation. */
+typedef struct gap_array {
+    int len; /* Number of elements in array */
+    void** array;
+} gap_array;
+
+int gap_extend(gap_array* gap);
+
+static inline int __attribute__((unused)) gap_set(gap_array* gap, int index, void* ptr)
+{
+    while (index >= gap->len) {
+        int res = gap_extend(gap);
+        if (res == -1) return -1;
+    }
+
+    gap->array[index] = ptr;
+    return 0;
+}
+
+static inline void* __attribute__((unused)) gap_get(gap_array* gap, int index)
+{
+    return gap->array[index];
+}
+
 #endif