3 ms·

Nothing new here. Node wasn't ever really meant to be used for CPU intensive tasks - especially the ones like this which you can fairly easy parallelize.

• UncleOxidant 16y ago
  Exactly, If I were using node and needed to calculate primes I'd probably write some C++ code to handle that part and run it as a server in a separate process that can be called asynchronously from node.
  • calpaterson 16y ago
    Hopefully you'd try another algorithm before you did that ;). Primality tests are one of the most highly understood and well documented areas of CS - trial division has been obsolete since, what, 1640?
    • btilly 16y ago
      ... trial division has been obsolete since, what, 1640? Longer than that. The sieve of Eratosthenes is attributed to Eratosthenes, who lived from 276 BC to 195 BC.
      • calpaterson 16y ago
        Hah, this exact thing occurred to me lying in bed last night :)