Re: [Armedbear-devel] single float representation and timing

bonasso bonasso@traclabs.com writes:

I solved this by coercing (get-internal-real-time) into a double float.

Looks like the epoch start time for these functions is different from lisp to lisp.

ACL: (get-internal-real-time) => 8456209511 ABCL: (get-internal-real-time) => 1401814359707

Does anyone know the date from which the value for (get-internal-real-time) is computed for abcl?

Why do you need to coerce it to anything for intermediate values? Store the value returned by (get-internal-real-time), then subtract it from another (get-internal-real-time), only then divide it by internal-time-units-per-second, and only then, if you need to, convert that into floats, for printing or something. That way you will lose minimal precision.