foo.js

/*

node@0.11.13 /usr/local/n/versions/0.11.13/bin/node
set   : 5115.5ops/sec avg:0.2 max:2 min:0
assign: 121.82ops/sec avg:8.21 max:16 min:7

*/

var ndarr = ndarray(new Uint8Array(32*32*32),[32,32,32])
for (var i=0;i<32*32*32;i++) {
  var v = Math.random()*255|0
  ndarr.data[i] = v
}

var ndarr2 = ndarray(new Uint8Array(32*32*32),[32,32,32])
var arr2 = new Uint8Array(32*32*32)

function benchAssign() {
  for (var i=0;i<100;i++) 
    ndops.assign(ndarr2,ndarr)
}
function benchSet() {
  for (var i=0;i<100;i++) 
    arr2.set(ndarr.data)
}

var _t = 2000
var _n = 10
utils.bench('set   ',benchSet    ,_t,_n)
utils.bench('assign',benchAssign ,_t,_n)