-Many of the internal improvements focused on being able to avoid
-Perl startup time in tests. "make check" now runs about 50%
-faster than before, and the new "make check-run" can be around
-30% faster after being primed by "make check".
+Some of the internal improvements involve avoiding Perl startup
+time in tests. "make check" now runs about 50% faster than
+before, and the new "make check-run" can be around 30% faster
+than "make check" after being primed by "make check".