Use more subprocesses

lib/check-signature.js

@@ -1,8 +1,13 @@
 const Nacl = require('tweetnacl/nacl-fast');
 
+// XXX npm "os" and "child_process"
+
 // TODO if this process is using too much CPU, we can use "cluster" to add load balancing to this code
 
+console.log('New child process', process.pid);
+
 process.on('message', function (data) {
+    console.log('In process', process.pid)
     console.log(+new Date(), "Message received by subprocess");
     if (!data || !data.key || !data.msg || !data.txid) {
         process.send({