tests/test-profile

bisect: use array.array rather than lists for ancestor lists

This nearly doubles performance and cuts memory usage in half on large
bisections.

#!/bin/sh

echo % test --time
hg --time help -q help 2>&1 | grep Time > /dev/null || echo --time failed

echo % test --profile
if "$TESTDIR/hghave" -q hotshot; then
    # hotshot might be missing for licensing issues
    hg --profile help -q help 2>&1 | grep ncalls > /dev/null || echo --profile failed
fi

echo % test --lsprof
if "$TESTDIR/hghave" -q lsprof; then
    hg --lsprof help -q help 2>&1 | grep CallCount > /dev/null || echo --lsprof failed
fi