How to optimize this code

Posted by phenevo on Stack Overflow See other posts from Stack Overflow or by phenevo
Published on 2010-03-17T16:16:16Z Indexed on 2010/03/17 16:21 UTC
Read the original article Hit count: 357

Filed under:

c#

|

perfomance

Hi I class Car it has a property: string Code and 10 other.

common codes is list of strings(string[] ) cars a list of cars(Car[]) filteredListOfCars is List.

for (int index = 0; index < cars.Length; index++)
            {
                Car car = cars[index];
                if (commonCodes.Contains(car.Code))
                {
                    filteredListOfCars.Add(car);
                }
            }

Unfortunately this piece of methodexecutes too long.

I have about 50k records

How can I lower execution time??

© Stack Overflow or respective owner

Related posts about c#

.NET WebRequest.PreAuthenticate not quite what it sounds like

as seen on West-Wind - Search for 'West-Wind'
I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:… >>> More
HttpWebRequest and Ignoring SSL Certificate Errors

as seen on West-Wind - Search for 'West-Wind'
Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to… >>> More
The dynamic Type in C# Simplifies COM Member Access from Visual FoxPro

as seen on West-Wind - Search for 'West-Wind'
I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot… >>> More
Dynamic Type to do away with Reflection

as seen on West-Wind - Search for 'West-Wind'
The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions… >>> More
Finding a Relative Path in .NET

as seen on West-Wind - Search for 'West-Wind'
Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test… >>> More

Related posts about perfomance

datagridview perfomance loading data

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I've got collection of 50k records, and i get it in one second, but loading it to database take about 10 secunds. How to increase loading data? Everything what i make now is: dgvCars.DataSource=cars; >>> More
Measure work perfomance

as seen on Stack Overflow - Search for 'Stack Overflow'
Does anyone know utility which can measure work intensity. For example - keystrokes\mouse clicks per second, time spent in IDE\other developer tools, total lines of code per hour...etc. >>> More
How to improve Java perfomance on Informix for Windows

as seen on Stack Overflow - Search for 'Stack Overflow'
I have problem with performance of Java UDR functions on Informix on Windows. On this server I already have some functions in C and SPL. I chose one function to write it in those 3 languages and I measured performance of this function on test table. Function calculates some kind of checksum so it… >>> More
How to get decent MySQL driver perfomance in Ruby

as seen on Stack Overflow - Search for 'Stack Overflow'
I notice that I am getting very poor performance for either or both inserts and queries. The queries themselves are basic and can execute with no delay directly from mysql. The ruby script that I wrote is only 1 thread, so only 1 connection is being used, and never closed unless the script is terminated… >>> More
Problem with WPF perfomance.

as seen on Stack Overflow - Search for 'Stack Overflow'
I have form which has many tabs. Every tab has many controls textboxes, comboboxes, datagrids and e .t.c. I bind form to one data source in such way this.DataContext=MyClassInstance But with this way my form opening very slow. about one minute. When I comment above code, form opens very quickly… >>> More