buffer allocators

[biasmv]

Most of the render code uses buffer pools to manage typed arrays. The code also provides a fallback path for non-pooled allocation. That's bad as it requires manually checking for the presence of buffer pools:

 if (pool) {
  var array = pool.request(size); 
 } else {
   var array = new Float32Array(size); 
}

Instead, two types of allocators should be provided, one which just news the typed arrays, and another which uses a pool of buffers. The code simplifies to:

var array = allocator.request(size)