derekcollison

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

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

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

~/Development/go/src/github.com/nats-io/gnatsd/test> GOMAXPROCS=3 go test -run="-" -bench="."
PASS
Benchmark___PubNo_Payload-3	10000000	       194 ns/op	  56.48 MB/s
Benchmark___Pub8b_Payload-3	10000000	       186 ns/op	 101.77 MB/s
Benchmark__Pub32b_Payload-3	10000000	       208 ns/op	 210.76 MB/s
Benchmark_Pub256B_Payload-3	 5000000	       289 ns/op	 929.40 MB/s
Benchmark___Pub1K_Payload-3	 2000000	       630 ns/op	1645.63 MB/s
Benchmark___Pub4K_Payload-3	  500000	      3255 ns/op	1262.32 MB/s
Benchmark___Pub8K_Payload-3	  200000	      6903 ns/op	1188.59 MB/s
Benchmark__________PubSub-3	 3000000	       408 ns/op

derekcollison

~/Development/vcap/apps/crash_foo> vmc push foo

Would you like to deploy from the current directory? [Yn]: 
Application Deployed URL: 'foo.cloudfoundry.com'? 
Detected a Sinatra Application, is this correct? [Yn]: 
Memory Reservation [Default:128M] (64M, 128M, 256M, 512M, 1G or 2G) 
Creating Application: OK
Would you like to bind any services to 'foo'? [yN]: 
Uploading Application:
  Checking for available resources: OK

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"

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

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

telnet demo.nats.io 4222
Connected to demo.nats.io.
Escape character is '^]'.
INFO {"server_id":"ad29ea9cbb16f2865c177bbd4db446ca","version":"0.6.8","go":"go1.5.1","host":"0.0.0.0","port":4222,"auth_required":false,"ssl_required":false,"max_payload":1048576} 
SUB foo 1
+OK
PUB foo 6 
hello!
+OK
MSG foo 1 6

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