NUM_CPU in run-fuzz

Author: algesten

run-fuzz.sh

@@ -1,7 +1,11 @@
 #!/bin/sh
 
+# This is for macOS.
+# For linux use: NUM_CPUS=$(awk '/^processor/ {++n} END {print n+1}' /proc/cpuinfo)
+NUM_CPUS=$(sysctl -n hw.ncpu)
+
 if [ "$1" == "" ]; then
     cargo +nightly fuzz list
 else
-    cargo +nightly fuzz run $1 -- --stop-after-first-failure -max_len=200000
+    cargo +nightly fuzz run $1 --jobs $NUM_CPUS -- --stop-after-first-failure -max_len=200000
 fi