Tagged Questions

For questions pertaining to the measurement or improvement of code efficiency.

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Indexed Views on Sql server 2008 R2

I have a Sql Server 2008 R2 database containing a very huge table that we use for reporting. Every night around 40,000 records are inserted into the table. I read in many articles that Indexed views ...
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1answer
18 views

Performance considerations for unmatched selectors

It's oft recommended optimization to consolidate your javascript into fewer parts and reduce the number http requests. On a smaller site you could easily arrive at structure like: /js/jQuery-xx.js ...
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MySQL index in between where clause and order by clause

My table structure is something like below: CREATE TABLE test ( id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT, field_1 VARCHAR(60) NOT NULL, field_2 INT(10) UNSIGNED NULL, field_3 ...
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1answer
44 views

Java - Directly accessing an object in a list that contains a given value

I am searching for a way in Java to directly access an object in a list that contains a given object. what i mean is something like this List<ObjectA> list = new ArrayList<ObjectA>(); ...
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3answers
27 views

.filter(':last') vs. .last()

I was wondering if there is any difference between .filter(':last') and .last()? For me it looks like they're doing the same, but I'm new to jQuery. If there is no difference in the result, which one ...
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1answer
8 views

WCF InsufficientMemoryException from Server while buffering

I am getting this error on my server. System.InsufficientMemoryException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 Failed to allocate a managed memory ...
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11 views

Which approach and database to use in performance-critical solution

I have the following scenario: Around 70 million of equipments send a signal every 3~5 minutes to the server sending its id, status (online or offiline), IP, location (latitude and longitude), ...
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1answer
35 views

An efficient Javascript set structure

After reading many similar questions: JavaScript implementation of a set data structure Mimicking sets in JavaScript? Node JS, traditional data structures? (such as Set, etc), anything like ...
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0answers
27 views

Importing Large Matrices: Import All or by Column? - MATLAB

General programming question, but there might be specific considerations for Matlab. I will be importing very large data file. Is it better practice/faster/more efficient to import the whole file ...
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Y.DataSchema.JSON.apply() performance problems in FireFox

I am calling: Y.DataSchema.JSON.apply( { ... }, "..." ) against a large complex JSON string -- 275K in size, with elements nested four levels deep. Additionally, some of the parsers in the schema ...
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1answer
16 views

Activity Load Time Calculate

i will use google analytics user timing api 1 and i want to find load time when activity loaded. How to do this? is there any way? thank you.
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21 views

QT how to read part of a column faster from a SQL Database

I wrote the following function: double_array get_open(QSqlDatabase db, QString symbol, int start_date, int end_date) { QSqlQuery qry(db); QString stat("select id, startdate, enddate from stocks ...
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1answer
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SPDY and lazy image loading via JavaScript

I'd like to load a bunch of images via JavaScript and insert them into my page. When the web server supports SPDY, does each image generate a new request or are all the image request bundled into one ...
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1answer
45 views

Difference between # and // in php?

<?php # some comment ?> and <?php // some comment ?> are used for single-line code commenting in PHP, and that former comes from shell scripting and // comes from C++. ...
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1answer
21 views

Log duration of an ASP Web API action

I am using an ActionFilter to log all action calls of my ASP.NET Web API project. The OnActionExecuted method tells a lot about what's been happening. I just can't figure out how to find an efficient ...

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