diff -Naur glibc-ok/malloc/malloc.c glibc-2.33/malloc/malloc.c
--- glibc-ok/malloc/malloc.c	2021-02-01 18:15:33.000000000 +0100
+++ glibc-2.33/malloc/malloc.c	2021-02-19 20:30:18.521402639 +0100
@@ -919,7 +919,7 @@
 #define M_TRIM_THRESHOLD       -1
 
 #ifndef DEFAULT_TRIM_THRESHOLD
-#define DEFAULT_TRIM_THRESHOLD (128 * 1024)
+#define DEFAULT_TRIM_THRESHOLD (512 * 1024)
 #endif
 
 /*
@@ -961,7 +961,7 @@
 */
 
 #ifndef DEFAULT_MMAP_THRESHOLD_MIN
-#define DEFAULT_MMAP_THRESHOLD_MIN (128 * 1024)
+#define DEFAULT_MMAP_THRESHOLD_MIN 0
 #endif
 
 #ifndef DEFAULT_MMAP_THRESHOLD_MAX