//---------------------------------------------------------------------------
// Todo -- critical for release:
// - address/close all the bug reports below (after writing docs)
-// - do a graph-drawing test
// - Get Josef to update the Callgrind --callgrind-out-file option.
//
// Todo -- nice, but less critical:
+// - do a graph-drawing test
// - make file format more generic. Obstacles:
// - unit prefixes are not generic
// - preset column widths for stats are not generic
// many-xpts 0.08s ma: 2.0s (25.0x, -----)
// konqueror 29.6s real 0:21.0s user
//
+// [Introduction of --time-unit=i as the default slowed things down by
+// roughly 0--20%.]
+//
// - get_XCon accounts for about 9% of konqueror startup time. Try
// keeping XPt children sorted by 'ip' and use binary search in get_XCon.
// Requires factoring out binary search code from various places into a