diff --git a/CMakeLists.txt b/CMakeLists.txt
index 31ea72f..dd98a58 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -111,6 +111,7 @@ endif()
 
 xoption(BUILD_EXAMPLES "Build examples" OFF)
 xoption(BUILD_STATIC_QJS_EXE "Build a static qjs executable" OFF)
+xoption(BUILD_CLI_WITH_MIMALLOC "Build the qjs executable with mimalloc" OFF)
 xoption(CONFIG_ASAN "Enable AddressSanitizer (ASan)" OFF)
 xoption(CONFIG_MSAN "Enable MemorySanitizer (MSan)" OFF)
 xoption(CONFIG_UBSAN "Enable UndefinedBehaviorSanitizer (UBSan)" OFF)
@@ -254,7 +255,11 @@ endif()
 if(NOT WIN32)
     set_target_properties(qjs_exe PROPERTIES ENABLE_EXPORTS TRUE)
 endif()
-
+if(BUILD_CLI_WITH_MIMALLOC)
+    find_package(mimalloc REQUIRED)
+    target_compile_definitions(qjs_exe PRIVATE QJS_USE_MIMALLOC)
+    target_link_libraries(qjs_exe mimalloc-static)
+endif()
 
 # Test262 runner
 #
diff --git a/qjs.c b/qjs.c
index 6cbbd6c..89aadce 100644
--- a/qjs.c
+++ b/qjs.c
@@ -38,6 +38,10 @@
 #include "cutils.h"
 #include "quickjs-libc.h"
 
+#ifdef QJS_USE_MIMALLOC
+#include <mimalloc.h>
+#endif
+
 extern const uint8_t qjsc_repl[];
 extern const uint32_t qjsc_repl_size;
 
@@ -230,7 +234,6 @@ static void *js_trace_calloc(void *opaque, size_t count, size_t size)
 
 static void *js_trace_malloc(void *opaque, size_t size)
 {
-    (void) opaque;
     void *ptr;
     ptr = malloc(size);
     js_trace_malloc_printf(opaque, "A %zd -> %p\n", size, ptr);
@@ -261,6 +264,38 @@ static const JSMallocFunctions trace_mf = {
     js__malloc_usable_size
 };
 
+#ifdef QJS_USE_MIMALLOC
+static void *js_mi_calloc(void *opaque, size_t count, size_t size)
+{
+    return mi_calloc(count, size);
+}
+
+static void *js_mi_malloc(void *opaque, size_t size)
+{
+    return mi_malloc(size);
+}
+
+static void js_mi_free(void *opaque, void *ptr)
+{
+    if (!ptr)
+        return;
+    mi_free(ptr);
+}
+
+static void *js_mi_realloc(void *opaque, void *ptr, size_t size)
+{
+    return mi_realloc(ptr, size);
+}
+
+static const JSMallocFunctions mi_mf = {
+    js_mi_calloc,
+    js_mi_malloc,
+    js_mi_free,
+    js_mi_realloc,
+    mi_malloc_usable_size
+};
+#endif
+
 #define PROG_NAME "qjs"
 
 void help(void)
@@ -438,7 +473,11 @@ int main(int argc, char **argv)
         js_trace_malloc_init(&trace_data);
         rt = JS_NewRuntime2(&trace_mf, &trace_data);
     } else {
+#ifdef QJS_USE_MIMALLOC
+        rt = JS_NewRuntime2(&mi_mf, NULL);
+#else
         rt = JS_NewRuntime();
+#endif
     }
     if (!rt) {
         fprintf(stderr, "qjs: cannot allocate JS runtime\n");