derekcollison

benchmark                     old ns/op     new ns/op     delta
Benchmark___PubNo_Payload     205           203           -0.98%
Benchmark___Pub8b_Payload     256           205           -19.92%
Benchmark__Pub32b_Payload     339           232           -31.56%
Benchmark_Pub256B_Payload     1082          319           -70.52%
Benchmark___Pub1K_Payload     4026          846           -78.99%
Benchmark___Pub4K_Payload     16623         5978          -64.04%
Benchmark___Pub8K_Payload     38252         19850         -48.11%
Benchmark__________PubSub     476           433           -9.03%
Benchmark__PubSubTwoConns     431           428           -0.70%

derekcollison

Keybase proof

I hereby claim:

• I am derekcollison on github.
• I am derekcollison (https://keybase.io/derekcollison) on keybase.
• I have a public key whose fingerprint is E20F 8432 C2ED 2407 82BC 7BCE 0688 7D71 4F24 9E24

To claim this, I am signing this object:

derekcollison

Verifying myself: My Bitcoin username is +derekcollison. https://onename.io/derekcollison

derekcollison

ubuntu vm on MBA 11" 2013

ubuntu@apcera-raring-amd64:~/go/src/github.com/apcera/gnatsd/test$ go test --run="zzz" --bench="."
PASS
Benchmark___PubNo_Payload	10000000	       209 ns/op	  52.59 MB/s
Benchmark___Pub8b_Payload	10000000	       293 ns/op	  95.40 MB/s
Benchmark__Pub32b_Payload	 5000000	       433 ns/op	 175.36 MB/s
Benchmark_Pub256B_Payload	 1000000	      1942 ns/op	 270.28 MB/s
Benchmark___Pub1K_Payload	  200000	      8971 ns/op	 229.84 MB/s

derekcollison

Impressed with the performance gains in go 1.1 on maps. I had to write my own for the original gnatsd.
HashMap is my own implementation.

go 1.0.3
~/Development/go/src/github.com/apcera/gnatsd/hashmap> go test --bench="."
PASS
Benchmark_GoMap___GetSmallKey   50000000	        53.1 ns/op	  18.82 MB/s
Benchmark_HashMap_GetSmallKey	10000000		21.4 ns/op	  46.69 MB/s
Benchmark_GoMap____GetMedKey	20000000	     	107 ns/op	   9.27 MB/s
Benchmark_HashMap__GetMedKey	50000000		34.7 ns/op	  28.78 MB/s

derekcollison

I have some early benchmark results for our work on a high performance NATS server in Go.

Quick Summary:
We can process ~2M msgs/sec through the system, and the ingress and egress are fairly well balanced.

The basics of the architecture are intelligent buffering and IO calls, fast hashing algorithms and subject distributor/routing, and a zero-allocation hand-written protocol parser.

In addition, I used quite a bit of inlining to avoid function overhead, no use of defer, and little to no object allocation within the fast path. I will share more details and the code at a future date.

derekcollison

I have done some more work on creating very fast hash algorithms in Go for small (3-8) and medium (16-32) size keys. Below are the current results.

NOTE: I used SetBytes(1) to give quick estimate of ops/sec

2012 MacbookAir 11" i7 2Ghz

================
OSX - Mountain Lion
Go version go1.0.3
================

derekcollison

I have really come to enjoy working in Go. From time to time I expect that the team at Apcera will
need to dip back into C for some things, but I decided to try to push the envelope with Go on making
some faster HashMaps than Go's builtin map. I started with the hash algorithms.

These are some results from my MBA11" core i7.. The fastest Hash algorithms will not work on machines
without support for unaligned access, and I still need to do some cleaning up before we OSS, but so far so good.

I aslo need to implement the fastest one, FNV1A_Hash_Yorikke, from http://http://www.sanmayce.com/Fastest_Hash

I hack SetBytes(1) to get a rough idea of ops/sec, its not actually IO.. So 10 MB/s is 10 Million ops per sec.

derekcollison

{
  "http://api.cloudfoundry.qa.mozycloud.com/":"token-xxx",
  "http://api.staging-cloudfoundry.com":"token-xxx",
  "https://api.cloudfoundry.com":"token-xxx",
  "http://api.derek.cloudfoundry.me":"token-xxx",
  "http://api.vcloudlabs.com":"token-xxx",
  "http://api.appcloud07.dev.mozycloud.com":"token-xxx",
  "http://api.cloudfoundry.com":"token-xxx",
  "http://cc.alpha.vmforce.com":"token-xxx",
  "https://api.vcloudlabs.com":"token-xxx",

derekcollison

#!/usr/bin/tclsh8.5
#
# Usage: unmerged branch1 branch2

proc getlog branch {
    lrange [split [exec git log $branch --oneline] "\n"] 0 100
}

proc diff {title c1 c2} {
    puts "\n$title"