arlib - npm Package Compare versions

Comparing version 0.0.23 to 0.0.24

lib/timeit.js

@@ -51,6 +51,21 @@ /**
 
+function dummy( ) { }
+
+var __timerOverhead;
+function calibrate( ) {
+    // timer overhead is ~ 1/100k sec, that throws off some timings
+    var i, t1, t2;
+    t1 = fptime();
+    for (i=0; i<100; i++) t2 = fptime();
+    __timerOverhead = (t2 - t1) / 100;
+    // the call overhead is 1 part in 50m, we dont try to correct for that
+}
+
 function timeit( nloops, f, msg, callback ) {
     var __i, __fn = (typeof f === 'function' ? f : Function(f));
+    var __t1, __t2;
     if (typeof msg === 'function') { callback = msg; msg = undefined; }
 
+    if (__timerOverhead === undefined) calibrate(nloops);
+
     if (!callback) {
@@ -60,10 +75,11 @@ // node v0.11.x strongly penalizes parsing the function in the timed loop; v0.10 did not
         __fn();
+        __fn();
 
-        var __t1 = fptime();
+        __t1 = fptime();
         for (__i=0; __i<nloops; ++__i) {
             __fn();
         }
-        var __t2 = fptime();
+        __t2 = fptime();
 
-        var __duration = (__t2 - __t1);
+        var __duration = (__t2 - __t1 - __timerOverhead);
         reportit(f, nloops, __duration, msg ? msg : "AR:");
@@ -81,3 +97,3 @@ }
                     __t2 = fptime();
-                    var __duration = (__t2 - __t1);
+                    var __duration = (__t2 - __t1 - __timerOverhead);
                     reportit(f, nloops, __duration, msg ? msg : "AR:");
@@ -87,3 +103,3 @@ }
                     __fn(function() {
-                        if (__depth++ > 40) { __depth = 0; setImmediate(__launchNext); }
+                        if (__depth++ > 400) { __depth = 0; setImmediate(__launchNext); }
                         else __launchNext();
@@ -90,0 +106,0 @@ });

package.json

 {
   "name": "arlib",
-  "version": "0.0.23",
+  "version": "0.0.24",
   "description": "Andras' Utility Functions",
@@ -5,0 +5,0 @@ "license": "Apache-2.0",

Readme.md

@@ -102,3 +102,4 @@ # arlib
 If function is a string it will be eval-d.  The function under test is run
-once to compile it (and not include the cost of compilation in the timings),
+twice to compile it (and not include the cost of compilation in the timings)
+and prime the node optimizer,
 then count times back-to-back for the benchmark.
@@ -105,0 +106,0 @@

No alert changes

Improved metrics

Total package byte prevSize

59065

increased by0.85%

Number of package files

31

increased by3.33%

Lines of code

1324

increased by0.99%

Number of lines in readme file

151

increased by0.67%

No dependency changes