javascript - speed of setter functions not what expected -

-

I am comparing the performance of two different types of sets as shown below: 

  Var q = {}; Var z = {}; (Function () {var x = 1; q.x = function () {return x;}; q.x.set = function (val) {x = val;};}) (); (Function () {var x = 1; z.x = function () {return x;}; z.x_set = function (val) {x = val;};}) ();   
 The difference is where the setter is stored:  q.x.set  vs  z.x_set . I hope that the  z  version to run faster because it needs to see a lower table contrast the  q  version is constantly fast, why any thoughts? Here's a few results:   
 
 
 There are some results from the different browsers of your experiment. Let's take a look at the results.  
 So we expect to be faster than  z  to  q . But when we examine the results, we see two different categories of results.  
     
  1.  The result is a little faster, moving towards  almost  similar,  q .  
  2.   OR   z  is quite fast. It tells me that it is on the mercy of the implementation of various JS engines. Various JS engines use a ton of low level adaptation, at the time of these very small atomic operations. Change the characteristics of Perhaps the  q  pattern triggers an optimization that is not in some browsers. Or maybe some browsers have optimization for the  z  pattern, which does not support older browsers. But given the lack of continuity, it is very difficult to answer  why .  
     One thing that clearly makes results, is that  is faster than   z   q . Sometimes  q  gets faster, but when  z  gets faster, then it is very fast.  
     chart!  
     
     But practically, the difference Is negligible. It is a small operation. Small changes in small operations can take major changes, which are in the perspective of one percent, but in a large application, there are very small changes in performance profiles. Personally, I think this is academically interesting, but there are very few real results.

Comments

Post a Comment

Popular posts from this blog

php - PDO bindParam() fatal error -

-
I am trying to learn PDO, now I have written this small code, but it gives me a serious error: Fatal error: Call a member function at a non-object dot () ... $ con = new mysqli ("127.0.0.1", "root", "", "csvdangercheck"); $ Query = $ con- & gt; ("Id,` var1`, `var2`) values ​​(" id,: var1,: var2) ";); $ query- & gt; bypass pattern (': id', $ id); $ query- & gt; BindParam (': var1', $ VAL1); $ Query- & gt; bindParam (': var2', $ val2); $ Query-> Executed (); I Trying to use print_r ($ con-> errorInfo ()) but Fatal error: Undefined method mysqli :: errorInfo ( ) ... can someone tell me what am I missing? Flaffeh said, you have PDO Missing Mysqy, try it: $ con = new PDO ('mysql: host = 127.0.0.1; dbname = csvdangercheck', 'root', '');
Read more

php - How can I cram 6+31 numeric characters into 22 alphanumeric characters? -

-
I have a 6 digit number and a 31-digit number (such as "234536" and "201103231043330478311223582826") that I The API needs to be crawled in the same 22-character alphanumeric field that uses PHP. I tried to convert each one to 32 (using custom code could not handle the base_convert () large number) and to connect with a single-character delimiter, but It only gives me 26 characters This is a restore API, so the letters should be URI-protected. I would like to do a database table cross with two references without reference to another reference value, if possible, any suggestions? Instead use a radix of 62. This will give you 22 characters for the top, 3.35 for the pre and 17.3 for the next. & gt; & Gt; & Gt; Math.log (10 ** 6) /math.log (62) 3.3474826039165504 & gt; & Gt; & Gt; Math.log (10 ** 31) /math.log (62) 17.295326786902177
Read more

logging - How can I log both the Request.InputStream and Response.OutputStream traffic in my ASP.NET MVC3 Application for specific Actions? -

-
For a specific set of tasks, I need to log in to the incoming request inputstream as well as outgoing response. is. I am using an ActionFilterAttribute for this and overriding the OnActionExecuted and OnResultExecuted methods. So I'm starting with this idea ... Public category ActionLoggerAttribute: ActionFilterArrbit {Public Override Zero On-Offed Execution (ActionActioned Contact Filter Filter) {base.OnActionAxecuted (FilterContext); HttpRequestBase request = filterContext.HttpContext.Request; // TODO: Log the request. InputStream} Public Override Zero OnResultExecuted (ResultExecutedContext FilterContext) {base.OnResultExecuted (filterContext); HTTPRPSPointBase Response = FilterContacts Hpptex response; // TODO: Log on Response.OutputStream}} Ideally I'll hook it up with enterprise library logging because I'm already using it for error logging. Am I reaching the input and output stream at the right time? Can I easily use the Enterprise Library to log i...
Read more