get-internal-run-time

(get-internal-run-time)

Returns the consumed run (CPU) time in milliseconds, suitable for measuring processing time by differencing two readings. Every backend returns an integer. As with get-internal-real-time, only the difference between two readings is meaningful, not the absolute value.

Bracket a computation with two calls and subtract to obtain the run time it consumed. The value depends on prior execution, so it is non-deterministic. A --no-wasi module has only the one clock its host set, so this reads the same value as get-internal-real-time there and a bracket measures zero (see the clock and randomness guide).