I think what would work is declaring some number of mutexes, in array like
48. Then you can compute CRC32 of the token, and lock based on modulo. But
yes, probably best would be to change underlying code and just partitioning
the work by hash.
const concurrency = 48
type concurrentChecks struct {
mutex [concurrency]sync.Mutex
}
func (c *concurrentChecks) addCheck(token string) {
mutex_num := crc32.ChecksumIEEE([]byte(token)) % concurrency
c.mutex[mutex_num].Lock()
}
func (c *concurrentChecks) removeCheck(token string) {
mutex_num := crc32.ChecksumIEEE([]byte(token)) % concurrency
c.mutex[mutex_num].Unlock()
}
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