Merge pull request #83 from albop/timing

ENH: added tic, tac, toc functions

quantecon/tests/test_timing.py

@@ -0,0 +1,32 @@
+"""
+Filename: timing.py
+Authors: Pablo Winant
+Tests for timing.py
+"""
+
+def test_tic_tac_toc():
+
+    from ..timing import tic, tac, toc
+    import time
+
+    h = 0.1
+
+    tic()
+
+    time.sleep(h)
+    el1 = tac()
+
+    time.sleep(h)
+    el2 = tac()
+
+    time.sleep(h)
+    el3 = toc()
+
+    assert(abs(el1-h)<0.01)
+    assert(abs(el2-h)<0.01)
+    assert(abs(el3-h*3)<0.01)
+
+
+if __name__ == "__main__":
+
+    test_tic_tac_toc()

quantecon/timing.py

@@ -0,0 +1,81 @@
+"""
+Filename: timing.py
+Authors: Pablo Winant
+Date: 10/16/14
+Provides Matlab-like tic, tac and toc functions.
+"""
+
+class __Timer__:
+    '''Computes elapsed time, between tic, tac, and toc.
+
+    Methods
+    -------
+    tic :
+        Resets timer.
+    toc :
+        Returns and prints time elapsed since last tic().
+    tac :
+        Returns and prints time elapsed since last
+             tic(), tac() or toc() whichever occured last.
+    '''
+
+    start = None
+    last = None
+
+    def tic(self):
+        """Resets timer."""
+
+
+        import time
+
+        t = time.time()
+        self.start = t
+        self.last = t
+
+
+    def tac(self):
+        """Returns and prints time elapsed since last tic()"""
+
+        import time
+
+        if self.start is None:
+            raise Exception("tac() without tic()")
+
+        t = time.time()
+        elapsed = t-self.last
+        self.last = t
+
+        print("TAC: Elapsed: {} seconds.".format(elapsed))
+        return elapsed
+
+
+    def toc(self):
+        """Returns and prints time elapsed since last
+        tic() or tac() whichever occured last"""
+
+        import time
+
+        if self.start is None:
+            raise Exception("toc() without tic()")
+
+        t = time.time()
+        self.last = t
+        elapsed = t-self.start
+
+
+        print("TOC: Elapsed: {} seconds.".format(elapsed))
+        return elapsed
+
+__timer__ = __Timer__()
+
+def tic():
+    """Saves time for future use with tac or toc."""
+    return __timer__.tic()
+
+def tac():
+    """Prints and returns elapsed time since last tic, tac or toc."""
+    return __timer__.tac()
+
+def toc():
+    """Prints and returns elapsed time since last tic, tac or toc."""
+    return __timer__.toc()