--- Libc/Libc-1725.40.4/tests/open_memstream.c
+++ /dev/null
@@ -1,45 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-
-#include <darwintest.h>
-#include <darwintest_perf.h>
-
-static void
-perf_fixed_size(size_t size_per_write)
-{
-	dt_stat_time_t latency = dt_stat_time_create("write_latency",
-			"adding %zu bytes to a memstream", size_per_write);
-	dt_stat_set_variable_d(latency, "bytes", (double)size_per_write);
-	char *src = calloc(1, size_per_write);
-	T_QUIET; T_ASSERT_NOTNULL(src, "allocated source buffer");
-
-	while (!dt_stat_stable(latency)) {
-		char *buf = NULL;
-		size_t size = 0;
-
-		FILE *victim = open_memstream(&buf, &size);
-		T_QUIET; T_WITH_ERRNO; T_ASSERT_NOTNULL(victim, "opened memstream");
-
-		T_STAT_MEASURE_BATCH(latency) {
-			(void)fwrite(src, size_per_write, 1, victim);
-		}
-
-		fclose(victim);
-		T_QUIET; T_ASSERT_NOTNULL(buf, "buffer was set by open_memstream");
-		T_QUIET; T_ASSERT_GE(size, size_per_write,
-				"memstream added non-zero bytes");
-
-		free(buf);
-	}
-
-	free(src);
-	dt_stat_finalize(latency);
-}
-
-T_DECL(perf_open_memstream, "measure the performance of open_memstream")
-{
-	size_t sizes[] = { 1, 8, 16, 64, 1024, 2048, 4096, 16 * 1024 };
-	for (size_t i = 0; i < sizeof(sizes) / sizeof(sizes[0]); i++) {
-		perf_fixed_size(sizes[i]);
-	}
-}