Unfortunately I don't believe this is possible at the moment because doing addition/subtraction has the potential to overflow into the next number.
Just have a few ints to track, but don't want the overhead of channels or mutexex? Neither did I. So I decided to pack many numbers into a single number.
This is experimental.
Early indications are that it is good for avoiding mutexes and their overhead by being able to use the sync/atomic package on multiple numbers at a time.
Tested with go1.15.2 windows/amd64 on a i7-8750H CPU @ 2.20GHz, 2208 Mhz, 6 Cores, 12 Logical Processors
go test -benchmem -bench .
goos: windows
goarch: amd64
pkg: github.com/ograycode/intpacker
BenchmarkUint32AtomicAdd-12 118378352 10.1 ns/op 0 B/op 0 allocs/op
BenchmarkUint32WithMutex-12 63579248 17.1 ns/op 0 B/op 0 allocs/op
BenchmarkUint32AtomicAddParallel-12 45477213 24.6 ns/op 0 B/op 0 allocs/op
BenchmarkUint32WithMutexParallel-12 16742941 72.4 ns/op 0 B/op 0 allocs/op
PASS
- More tests.
- More benchmarks.
- How to pack and unpack more types, like signed ints.
- How to fully support negative numbers.