alias number = f32;

struct VectorBatch {
  size: vec4<u32>,
  data: array<number>,
}

struct ScalarBatch {
  size: vec4<u32>,
  data: array<number>,
}

@group(0) @binding(0)
var<storage, read> v: VectorBatch;
@group(0) @binding(1)
var<storage, read_write> result: ScalarBatch;

@compute @workgroup_size(1)
fn main(@builtin(global_invocation_id) global_id: vec3<u32>) {
  result.size.z = v.size.z;

  var s = 0f;
  let lo = global_id.z * v.size.x;
  for (var i = 0u; i < v.size.x; i++) {
    s += v.data[lo + i];
  }

  result.data[global_id.z] = sqrt(s);
}