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.

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

grier

public static void doSnapshot(String url, String username, String password, String vmname, String snapshotname) throws Exception
{
    ServiceInstance si = new ServiceInstance(new URL(url), username, password, true);
    Folder rootFolder = si.getRootFolder();
    VirtualMachine vm = null;

    vm = (VirtualMachine) new InventoryNavigator(rootFolder).searchManagedEntity("VirtualMachine", vmname);

    if(vm==null)
    {

border

include $(GOROOT)/src/Make.inc

GOFMT=gofmt -spaces=true -tabindent=false -tabwidth=4

all:
	$(GC) jsontest.go 
	$(LD) -o jsontest.out  jsontest.$O

format:
	$(GOFMT) -w jsontest.go