Prioritize step 1

.circleci/soltest_all.sh

@@ -31,7 +31,25 @@ REPODIR="$(realpath $(dirname $0)/..)"
 # This number has to equal the number of steps below.
 STEPS=11
 
-RUN_STEPS=$(seq "$STEPS" | circleci tests split)
+if [ "$CIRCLE_NODE_TOTAL" -a "$CIRCLE_NODE_TOTAL" -gt 1 ]
+then
+    # Run step 1 as the only step on the first executor
+    # and evenly distribute the other steps among
+    # the other executors.
+    # The first step takes much longer than the other steps.
+    if [ "$CIRCLE_NODE_INDEX" = "0" ]
+    then
+        RUN_STEPS="1"
+    else
+        export CIRCLE_NODE_INDEX=$(($CIRCLE_NODE_INDEX - 1))
+        export CIRCLE_NODE_TOTAL=$(($CIRCLE_NODE_TOTAL - 1))
+        RUN_STEPS=$(seq 2 "$STEPS" | circleci tests split)
+    fi
+else
+    RUN_STEPS=$(seq "$STEPS")
+fi
+
+# turn newlines into spaces
 RUN_STEPS=$(echo $RUN_STEPS)
 
 echo "Running steps $RUN_STEPS..."