Set a reasonable CONCURRENCY_LEVEL for a 4-core amd64 machine

(cherry picked from commit ebfca88845c46567d7c47cab24f6466e3482525b)

diff --git a/zygo/do b/zygo/do
index 672c12c221d81bf7b98e8ba61e05f3fac293b66d..ac83db98d0b409c38d6613ab18e2602aefd9753a 100755 (executable)
--- a/zygo/do
+++ b/zygo/do
@@ -2,6 +2,7 @@
 set -axP
 ORIG_PATH="$PATH"
 PATH="$PWD/zygo:$ORIG_PATH"
+CONCURRENCY_LEVEL="${CONCURRENCY_LEVEL-8}"
 
 # Rename the kernel directory
 rename-kernel