Sleep to go faster

The problem was I was basically flushing twice for every message when
doing request reply.
This gives the sender the opportunity to finish writing a full message
to the queue, which we then check for before flushing.

This makes request reply latency benchmarks go down from like 90ms to
200us.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/Server.zig b/src/Server.zig
index e20f5c0..49f54e2 100644
--- a/src/Server.zig
+++ b/src/Server.zig
@@ -47,6 +47,7 @@ const Subscription = struct {
             // would put an invalid set series of bytes in the receivers queue.
             _ = try self.queue.putUncancelable(io, chunk, chunk.len);
         }
+        try io.checkCancel();
     }
 };
 
@@ -382,7 +383,10 @@ fn publishMessage(
             ) catch unreachable;
             msg_chunks.appendBounded(msg.payload) catch unreachable;
 
-            try subscription.send(io, msg_chunks.items[0..chunk_count]);
+            subscription.send(io, msg_chunks.items[0..chunk_count]) catch |err| switch (err) {
+                error.Closed => {},
+                error.Canceled => |e| return e,
+            };
         }
     }