Merge pull request #25 from xnxkzeu/patch-1

Relaxed memory ordering is enough for atomic counter

src/session.rs

@@ -84,7 +84,7 @@ pub struct JobIdCounter(Arc<AtomicU64>);
 impl JobIdCounter {
     #[allow(clippy::should_implement_trait)]
     pub fn next(&self) -> JobId {
-        JobId(self.0.fetch_add(1, Ordering::SeqCst))
+        JobId(self.0.fetch_add(1, Ordering::Relaxed))
     }
 }