+# --hpc: build stage2 with -fhpc, and see how much of the
+# compiler the test suite covers.
+# 2008-07-01: 63% slower than the default.
+# HTML generated here: testsuite/hpc_output/hpc_index.html
+# --fast: Default. Opposite to --slow.
+# --slow: Build stage2 with -DDEBUG.
+# 2008-07-01: 14% slower than the default.