bench

benches/micro_ops.cm

@@ -0,0 +1,261 @@
+// micro_ops.bench.ce (or .cm depending on your convention)
+
+// Note: We use a function-local sink in each benchmark to avoid cross-contamination
+function blackhole(sink, x) {
+  // Prevent dead-code elimination
+  return (sink + (x | 0)) | 0
+}
+
+function make_obj_xy(x, y) {
+  return { x, y }
+}
+
+function make_obj_yx(x, y) {
+  // Different insertion order to force a different shape in many engines
+  return { y, x }
+}
+
+function make_shapes(n) {
+  var out = []
+  for (var i = 0; i < n; i++) {
+    var o = { a: i }
+    o[`p${i}`] = i
+    out.push(o)
+  }
+  return out
+}
+
+function make_packed_array(n) {
+  var a = []
+  for (var i = 0; i < n; i++) a.push(i)
+  return a
+}
+
+function make_holey_array(n) {
+  var a = []
+  for (var i = 0; i < n; i += 2) a[i] = i
+  return a
+}
+
+return {
+  // 0) Baseline loop cost
+  loop_empty: function(n) {
+    var sink = 0
+    for (var i = 0; i < n; i++) {}
+    return blackhole(sink, n)
+  },
+
+  // 1) Numeric pipelines
+  i32_add: function(n) {
+    var sink = 0
+    var x = 1
+    for (var i = 0; i < n; i++) x = (x + 3) | 0
+    return blackhole(sink, x)
+  },
+
+  f64_add: function(n) {
+    var sink = 0
+    var x = 1.0
+    for (var i = 0; i < n; i++) x = x + 3.14159
+    return blackhole(sink, x | 0)
+  },
+
+  mixed_add: function(n) {
+    var sink = 0
+    var x = 1
+    for (var i = 0; i < n; i++) x = x + 0.25
+    return blackhole(sink, x | 0)
+  },
+
+  bit_ops: function(n) {
+    var sink = 0
+    var x = 0x12345678
+    for (var i = 0; i < n; i++) x = ((x << 5) ^ (x >>> 3)) | 0
+    return blackhole(sink, x)
+  },
+
+  overflow_path: function(n) {
+    var sink = 0
+    var x = 0x70000000
+    for (var i = 0; i < n; i++) x = (x + 0x10000000) | 0
+    return blackhole(sink, x)
+  },
+
+  // 2) Branching
+  branch_predictable: function(n) {
+    var sink = 0
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      if ((i & 7) != 0) x++
+      else x += 2
+    }
+    return blackhole(sink, x)
+  },
+
+  branch_alternating: function(n) {
+    var sink = 0
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      if ((i & 1) == 0) x++
+      else x += 2
+    }
+    return blackhole(sink, x)
+  },
+
+  // 3) Calls
+  call_direct: function(n) {
+    var sink = 0
+    function f(a) { return (a + 1) | 0 }
+    var x = 0
+    for (var i = 0; i < n; i++) x = f(x)
+    return blackhole(sink, x)
+  },
+
+  call_indirect: function(n) {
+    var sink = 0
+    function f(a) { return (a + 1) | 0 }
+    var g = f
+    var x = 0
+    for (var i = 0; i < n; i++) x = g(x)
+    return blackhole(sink, x)
+  },
+
+  call_closure: function(n) {
+    var sink = 0
+    function make_adder(k) {
+      return function(a) { return (a + k) | 0 }
+    }
+    var add3 = make_adder(3)
+    var x = 0
+    for (var i = 0; i < n; i++) x = add3(x)
+    return blackhole(sink, x)
+  },
+
+  // 4) Object props (ICs / shapes)
+  prop_read_mono: function(n) {
+    var sink = 0
+    var o = make_obj_xy(1, 2)
+    var x = 0
+    for (var i = 0; i < n; i++) x = (x + o.x) | 0
+    return blackhole(sink, x)
+  },
+
+  prop_read_poly_2: function(n) {
+    var sink = 0
+    var a = make_obj_xy(1, 2)
+    var b = make_obj_yx(1, 2)
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      var o = (i & 1) == 0 ? a : b
+      x = (x + o.x) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  prop_read_mega: function(n) {
+    var sink = 0
+    var objs = make_shapes(32)
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      var o = objs[i & 31]
+      x = (x + o.a) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  prop_write_mono: function(n) {
+    var sink = 0
+    var o = make_obj_xy(1, 2)
+    for (var i = 0; i < n; i++) o.x = (o.x + 1) | 0
+    return blackhole(sink, o.x)
+  },
+
+  // 5) Arrays
+  array_read_packed: function(n) {
+    var sink = 0
+    var a = make_packed_array(1024)
+    var x = 0
+    for (var i = 0; i < n; i++) x = (x + a[i & 1023]) | 0
+    return blackhole(sink, x)
+  },
+
+  array_write_packed: function(n) {
+    var sink = 0
+    var a = make_packed_array(1024)
+    for (var i = 0; i < n; i++) a[i & 1023] = i
+    return blackhole(sink, a[17] | 0)
+  },
+
+  array_read_holey: function(n) {
+    var sink = 0
+    var a = make_holey_array(2048)
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      var v = a[(i & 2047)]
+      // If "missing" is a special value in your language, this stresses that path too
+      if (v) x = (x + v) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  array_push_steady: function(n) {
+    var sink = 0
+    var x = 0
+    for (var j = 0; j < n; j++) {
+      var a = []
+      for (var i = 0; i < 256; i++) a.push(i)
+      x = (x + a.length) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  // 6) Strings
+  string_concat_small: function(n) {
+    var sink = 0
+    var x = 0
+    for (var j = 0; j < n; j++) {
+      var s = ""
+      for (var i = 0; i < 16; i++) s = s + "x"
+      x = (x + s.length) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  // 7) Allocation / GC pressure
+  alloc_tiny_objects: function(n) {
+    var sink = 0
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      var o = { a: i, b: i + 1, c: i + 2 }
+      x = (x + o.b) | 0
+    }
+    return blackhole(sink, x)
+  },
+
+  alloc_linked_list: function(n) {
+    var sink = 0
+    var head = null
+    for (var i = 0; i < n; i++) head = { v: i, next: head }
+    var x = 0
+    var p = head
+    while (p) {
+      x = (x + p.v) | 0
+      p = p.next
+    }
+    return blackhole(sink, x)
+  },
+
+  // 8) meme-specific (adapt these to your exact semantics)
+  meme_clone_read: function(n) {
+    // If meme(obj) clones like Object.create / prototypal clone, this hits it hard.
+    // Replace with your exact meme call form.
+    var sink = 0
+    var base = { x: 1, y: 2 }
+    var x = 0
+    for (var i = 0; i < n; i++) {
+      var o = meme(base)
+      x = (x + o.x) | 0
+    }
+    return blackhole(sink, x)
+  }
+}