worker: log claim duration

packages/ws-worker/src/api/claim.ts

@@ -47,12 +47,17 @@ const claim = (
     }
     logger.debug(`requesting run (capacity ${activeWorkers}/${maxWorkers})`);
 
+    const start = Date.now()
     app.queueChannel
       .push<ClaimPayload>(CLAIM, { demand: 1 })
       .receive('ok', ({ runs }: ClaimReply) => {
+        const duration = Date.now() - start;
         logger.debug(
-          `claimed ${runs.length} runs: `,
-          runs.map((r) => r.id).join(',')
+          `claimed ${runs.length} runs in ${duration}ms (${
+            runs.length ? 
+            runs.map((r) => r.id).join(',')
+            : '-'
+          })`,
         );
         // TODO what if we get here after we've been cancelled?
         // the events have already been claimed...