What does allocs/op and B/op mean in go benchmark?

Question

When I run my benchmarks with go test -v -bench=. -benchmem, I see the following results.

f1     10000        120860 ns/op        2433 B/op              


        

Answer 1

allocs/op means how many distinct memory allocations occurred per op (single iteration).

B/op is how many bytes were allocated per op.