Use par_iter for keypair generation

account_manager/Cargo.toml

@@ -22,3 +22,4 @@ eth2_ssz = { path = "../eth2/utils/ssz" }
 eth2_ssz_derive = { path = "../eth2/utils/ssz_derive" }
 hex = "0.4"
 validator_client = { path = "../validator_client" }
+rayon = "1.2.0"

account_manager/src/lib.rs

@@ -2,6 +2,7 @@ mod cli;
 
 use clap::ArgMatches;
 use environment::RuntimeContext;
+use rayon::prelude::*;
 use slog::{crit, info};
 use std::fs;
 use std::path::PathBuf;
@@ -128,7 +129,7 @@ fn make_validators(
     spec: ChainSpec,
 ) -> Result<Vec<ValidatorDirectory>, String> {
     methods
-        .iter()
+        .par_iter()
         .map(|method| {
             let mut builder = ValidatorDirectoryBuilder::default()
                 .spec(spec.clone())