Commits on Oct 26, 2022

1. PublisherAsBlockingIterable LinkedBlockingQueue -> SpscBlockingQueue …

   Motivation:
   LinkedBlockingQueue allows for multiple producers and multiple consumers.
   It uses LockSupport park in offer and unpark in take. LockSupport unpark
   on the EventLoop thread has been shown to impact throughput during benchmarks.
   
   SpscBlockingQueue (yield_count == 1)
   ```
   Running 30s test @ http://localhost:8080/medium, using 'ServiceTalkGrpcBlockingClientStrAgg' client
     1024 threads and 1024 connections
     Thread Stats   Avg      Stdev     Max   +/- Stdev
       Latency       -          -       -           -
       Req/Sec     0.01k        -     0.01k         -
     291045 requests in 30s
   Requests/sec: 9701.50
   Transfer/sec: -
   OK: 291045
   KO: 0
   ```
   
   SpscBlockingQueue (yield_count == 2)
   ```
   Running 30s test @ http://localhost:8080/medium, using 'ServiceTalkGrpcBlockingClientStrAgg' client
     1024 threads and 1024 connections
     Thread Stats   Avg      Stdev     Max   +/- Stdev
       Latency       -          -       -           -
       Req/Sec     0.01k        -     0.01k         -
     328586 requests in 30s
   Requests/sec: 10952.87
   Transfer/sec: -
   OK: 328586
   KO: 0
   ```
   
   LinkedTransferQueue
   ```
   Running 30s test @ http://localhost:8080/medium, using 'ServiceTalkGrpcBlockingClientStrAgg' client
     1024 threads and 1024 connections
     Thread Stats   Avg      Stdev     Max   +/- Stdev
       Latency       -          -       -           -
       Req/Sec     0.01k        -     0.01k         -
     289396 requests in 30s
   Requests/sec: 9646.53
   Transfer/sec: -
   OK: 289396
   KO: 0
   ```

   

   Scottmitch committed Oct 26, 2022
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