Need to decrease allocations inside Helios reactors

[helios-io]

Need to decrease allocations inside Helios reactors

[Aaronontheweb]

Throughput is reasonable, but not great, at 100k messages per second.

But the number that concerns me is memory allocation, sitting at 2,624,928.00 bytes per 1000 messages. That includes both sending and receiving of the message.... But the other part that's a bit scary is that there's no observable garbage collection at all, whcih leads me to believe there might be a memory leak.

It's possible that this is just the result of Helios expanding its receive buffer, but I doubt it.

Either way, about damn time we had NBench coverage for this project.

[Aaronontheweb]

UDP results are similar

Helios.Tests.Performance.Socket.UdpThroughputSpec+OneWayThroughputBenchmark

Tests a full request/response sequence for 1000 messages
4/13/2016 1:06:36 AM

System Info

NBench=NBench, Version=0.2.1.0, Culture=neutral, PublicKeyToken=null
OS=Microsoft Windows NT 6.2.9200.0
ProcessorCount=4
CLR=4.0.30319.42000,IsMono=False,MaxGcGeneration=2
WorkerThreads=32767, IOThreads=4

NBench Settings

RunMode=Iterations, TestMode=Measurement
NumberOfIterations=13, MaximumRunTime=00:00:01

Data

---

Totals

Metric	Units	Max	Average	Min	StdDev
TotalBytesAllocated	bytes	2,683,304.00	2,621,415.38	2,594,768.00	22,950.99
TotalCollections [Gen0]	collections	0.00	0.00	0.00	0.00
TotalCollections [Gen1]	collections	0.00	0.00	0.00	0.00
TotalCollections [Gen2]	collections	0.00	0.00	0.00	0.00
[Counter] MessagesReceived	operations	1,000.00	1,000.00	1,000.00	0.00

Per-second Totals

Metric	Units / s	Max / s	Average / s	Min / s	StdDev / s
TotalBytesAllocated	bytes	296,714,067.72	284,466,083.54	273,768,026.26	6,026,048.40
TotalCollections [Gen0]	collections	0.00	0.00	0.00	0.00
TotalCollections [Gen1]	collections	0.00	0.00	0.00	0.00
TotalCollections [Gen2]	collections	0.00	0.00	0.00	0.00
[Counter] MessagesReceived	operations	111,282.98	108,515.75	104,880.07	2,063.00

Raw Data

TotalBytesAllocated

Run #	bytes	bytes / s	ns / bytes
1	2,619,344.00	277,284,891.60	3.61
2	2,647,944.00	280,805,955.59	3.56
3	2,611,552.00	285,640,285.25	3.50
4	2,602,200.00	285,755,073.36	3.50
5	2,610,296.00	273,768,026.26	3.65
6	2,632,584.00	286,855,100.57	3.49
7	2,608,960.00	276,610,227.00	3.62
8	2,683,304.00	296,714,067.72	3.37
9	2,622,592.00	286,262,293.29	3.49
10	2,594,768.00	288,753,519.32	3.46
11	2,610,552.00	286,921,140.85	3.49
12	2,621,992.00	287,111,899.52	3.48
13	2,612,312.00	285,576,605.63	3.50

TotalCollections [Gen0]

Run #	collections	collections / s	ns / collections
1	0.00	0.00	9,446,400.00
2	0.00	0.00	9,429,800.00
3	0.00	0.00	9,142,800.00
4	0.00	0.00	9,106,400.00
5	0.00	0.00	9,534,700.00
6	0.00	0.00	9,177,400.00
7	0.00	0.00	9,431,900.00
8	0.00	0.00	9,043,400.00
9	0.00	0.00	9,161,500.00
10	0.00	0.00	8,986,100.00
11	0.00	0.00	9,098,500.00
12	0.00	0.00	9,132,300.00
13	0.00	0.00	9,147,500.00

TotalCollections [Gen1]

Run #	collections	collections / s	ns / collections
1	0.00	0.00	9,446,400.00
2	0.00	0.00	9,429,800.00
3	0.00	0.00	9,142,800.00
4	0.00	0.00	9,106,400.00
5	0.00	0.00	9,534,700.00
6	0.00	0.00	9,177,400.00
7	0.00	0.00	9,431,900.00
8	0.00	0.00	9,043,400.00
9	0.00	0.00	9,161,500.00
10	0.00	0.00	8,986,100.00
11	0.00	0.00	9,098,500.00
12	0.00	0.00	9,132,300.00
13	0.00	0.00	9,147,500.00

TotalCollections [Gen2]

Run #	collections	collections / s	ns / collections
1	0.00	0.00	9,446,400.00
2	0.00	0.00	9,429,800.00
3	0.00	0.00	9,142,800.00
4	0.00	0.00	9,106,400.00
5	0.00	0.00	9,534,700.00
6	0.00	0.00	9,177,400.00
7	0.00	0.00	9,431,900.00
8	0.00	0.00	9,043,400.00
9	0.00	0.00	9,161,500.00
10	0.00	0.00	8,986,100.00
11	0.00	0.00	9,098,500.00
12	0.00	0.00	9,132,300.00
13	0.00	0.00	9,147,500.00

[Counter] MessagesReceived

Run #	operations	operations / s	ns / operations
1	1,000.00	105,860.43	9,446.40
2	1,000.00	106,046.79	9,429.80
3	1,000.00	109,375.68	9,142.80
4	1,000.00	109,812.88	9,106.40
5	1,000.00	104,880.07	9,534.70
6	1,000.00	108,963.32	9,177.40
7	1,000.00	106,023.18	9,431.90
8	1,000.00	110,577.88	9,043.40
9	1,000.00	109,152.43	9,161.50
10	1,000.00	111,282.98	8,986.10
11	1,000.00	109,908.23	9,098.50
12	1,000.00	109,501.44	9,132.30
13	1,000.00	109,319.49	9,147.50

[Aaronontheweb]

Done, fixed as part of 2.1