tests: Add framework for comparative benchmarking.

Motivation is optimizing handling of various constructs as well as
understanding which constructs are more efficient in MicroPython.
More info: http://forum.micropython.org/viewtopic.php?f=3&t=77

Results are wildly unexpected. For example, "optimization" of range
iteration into while loop makes it twice as slow. Generally, the more
bytecodes, the slower the code.

10 files changed, 83 insertions, 0 deletions

diff --git a/tests/bench/bench.py b/tests/bench/bench.py
new file mode 100644
index 000000000..0cd40a93f
--- /dev/null
+++ b/tests/bench/bench.py
@@ -0,0 +1,10 @@
+import time
+
+
+ITERS = 20000000
+
+def run(f):
+    t = time.time()
+    f(ITERS)
+    t = time.time() - t
+    print(t)
diff --git a/tests/bench/loop_count-1-range.py b/tests/bench/loop_count-1-range.py
new file mode 100644
index 000000000..e22adf6cb
--- /dev/null
+++ b/tests/bench/loop_count-1-range.py
@@ -0,0 +1,7 @@
+import bench
+
+def test(num):
+    for i in range(num):
+        pass
+
+bench.run(test)
diff --git a/tests/bench/loop_count-2-range_iter.py b/tests/bench/loop_count-2-range_iter.py
new file mode 100644
index 000000000..fe4a3857e
--- /dev/null
+++ b/tests/bench/loop_count-2-range_iter.py
@@ -0,0 +1,7 @@
+import bench
+
+def test(num):
+    for i in iter(range(num)):
+        pass
+
+bench.run(test)
diff --git a/tests/bench/loop_count-3-while_up.py b/tests/bench/loop_count-3-while_up.py
new file mode 100644
index 000000000..1ab8054a0
--- /dev/null
+++ b/tests/bench/loop_count-3-while_up.py
@@ -0,0 +1,8 @@
+import bench
+
+def test(num):
+    i = 0
+    while i < num:
+        i += 1
+
+bench.run(test)
diff --git a/tests/bench/loop_count-4-while_down_gt.py b/tests/bench/loop_count-4-while_down_gt.py
new file mode 100644
index 000000000..de8dee2ca
--- /dev/null
+++ b/tests/bench/loop_count-4-while_down_gt.py
@@ -0,0 +1,7 @@
+import bench
+
+def test(num):
+    while num > 0:
+        num -= 1
+
+bench.run(test)
diff --git a/tests/bench/loop_count-5-while_down_ne.py b/tests/bench/loop_count-5-while_down_ne.py
new file mode 100644
index 000000000..b9a1af414
--- /dev/null
+++ b/tests/bench/loop_count-5-while_down_ne.py
@@ -0,0 +1,7 @@
+import bench
+
+def test(num):
+    while num != 0:
+        num -= 1
+
+bench.run(test)
diff --git a/tests/bench/var-1-constant.py b/tests/bench/var-1-constant.py
new file mode 100644
index 000000000..eec977909
--- /dev/null
+++ b/tests/bench/var-1-constant.py
@@ -0,0 +1,8 @@
+import bench
+
+def test(num):
+    i = 0
+    while i < 20000000:
+        i += 1
+
+bench.run(test)
diff --git a/tests/bench/var-2-global.py b/tests/bench/var-2-global.py
new file mode 100644
index 000000000..5758ad61a
--- /dev/null
+++ b/tests/bench/var-2-global.py
@@ -0,0 +1,10 @@
+import bench
+
+ITERS = 20000000
+
+def test(num):
+    i = 0
+    while i < ITERS:
+        i += 1
+
+bench.run(test)
diff --git a/tests/bench/var-3-local.py b/tests/bench/var-3-local.py
new file mode 100644
index 000000000..124b48429
--- /dev/null
+++ b/tests/bench/var-3-local.py
@@ -0,0 +1,10 @@
+import bench
+
+
+def test(num):
+    ITERS = 20000000
+    i = 0
+    while i < ITERS:
+        i += 1
+
+bench.run(test)
diff --git a/tests/bench/var-4-arg.py b/tests/bench/var-4-arg.py
new file mode 100644
index 000000000..cf050c58f
--- /dev/null
+++ b/tests/bench/var-4-arg.py
@@ -0,0 +1,9 @@
+import bench
+
+
+def test(num):
+    i = 0
+    while i < num:
+        i += 1
+
+bench.run(lambda n:test(20000000))