Package number provides ultra-lightweight reflection for numeric types.
number.Reflect[T]() obtains a type descriptor for any numeric type T without reflection or allocation. It is about three times faster than package reflect to find the size of a type in bits:
$ go test -bench=.
goos: linux
goarch: amd64
pkg: github.com/zephyrtronium/number
cpu: Intel(R) Core(TM) i9-10885H CPU @ 2.40GHz
BenchmarkNumber-16 1000000000 0.9295 ns/op
BenchmarkNumberAny-16 1000000000 0.9223 ns/op
BenchmarkReflect-16 383663199 3.117 ns/op
PASS
ok github.com/zephyrtronium/number 3.572s