Adjust func-memory test to be shorter. (#780)

Some CI pipelines were occasionally timing out due to the func-memory
test taking too long. This change reduces the number of iterations
from 100 to 50 for each test run, which should help avoid timeouts
while still providing sufficient coverage.

It also adds some debug output to indicate the time taken for each test.

src/test/func/memory/memory.cc

@@ -1,4 +1,5 @@
 #include <array>
+#include <chrono>
 #include <iostream>
 #include <snmalloc/snmalloc.h>
 #include <test/opt.h>
@@ -532,7 +533,7 @@ void test_consolidaton_bug()
   }
 }
 
-int main(int argc, char** argv)
+int main(int, char**)
 {
   setup();
 #ifdef TEST_LIMITED
@@ -549,17 +550,17 @@ int main(int argc, char** argv)
     std::abort();
   }
 #endif
-#ifdef USE_SYSTEMATIC_TESTING
-  opt::Opt opt(argc, argv);
-  size_t seed = opt.is<size_t>("--seed", 0);
-  Virtual::systematic_bump_ptr() += seed << 17;
-#else
-  UNUSED(argc, argv);
-#endif
+  auto start = std::chrono::steady_clock::now();
 #define TEST(testname) \
-  std::cout << "Running " #testname << std::endl; \
-  for (size_t i = 0; i < 100; i++) \
-    testname();
+  do \
+  { \
+    auto end = std::chrono::steady_clock::now(); \
+    auto diff_seconds = \
+      std::chrono::duration_cast<std::chrono::seconds>(end - start).count(); \
+    std::cout << "Running " #testname << " @ " << diff_seconds << std::endl; \
+    for (size_t i = 0; i < 50; i++) \
+      testname(); \
+  } while (0);
 
   TEST(test_alloc_dealloc_64k);
   TEST(test_random_allocation);
@@ -576,5 +577,6 @@ int main(int argc, char** argv)
   TEST(test_calloc_16M);
   TEST(test_consolidaton_bug);
 
+  std::cout << "Tests completeed successfully!" << std::endl;
   return 0;
 }