f: Use all cores possible, and count the number of log directories

Author: tankyleo

.github/workflows/0fc-integration.yml

@@ -44,6 +44,9 @@ jobs:
         run: |
           echo "BITCOIND_EXE=$( pwd )/bin/bitcoind-${{ runner.os }}-${{ runner.arch }}" >> "$GITHUB_ENV"
           echo "ELECTRS_EXE=$( pwd )/bin/electrs-${{ runner.os }}-${{ runner.arch }}" >> "$GITHUB_ENV"
+      - name: Check the tmp dir to see how much data there is if we were to upload the logs
+        run: |
+          ls -l -d /tmp/??????? | wc -l
       - name: Test with 0FC enabled
         run: |
-          RUSTFLAGS="--cfg no_download --cfg cycle_tests --cfg tokio_unstable --cfg zero_fee_commitment_tests" cargo test -- --test-threads=1 --no-capture
+          RUSTFLAGS="--cfg no_download --cfg cycle_tests --cfg tokio_unstable --cfg zero_fee_commitment_tests" cargo test -- --no-capture