Tagged Questions

The performance of applications is often a paramount concern for mission critical systems. If your question pertains to optimization, whether it be database queries, algorithms, reducing network/transactional overhead, or anything that deals with speed or capacity, consider using this tag. A good ...

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7 views

GraphViz Dot very long duration of generation

I have a tree structure I want to be generated by Dot. Each node has 4 edges to another 4 nodes. In sum there are about 1,000 nodes. If I try to generate it with Dot it takes a very long time (once I ...
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0answers
36 views

Would this 'IN' use unique index in SQL

In a case, I need SQL like this, in Mysql, innodb engine: **select** code, title **from** my_table **where** code **in** ('cx001', 'kd309', 'yb020'); The column code has a unique index. Would the ...
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1answer
15 views

Why is performance so bad on this EF data import method?

I have a loop, abridged here, that performs an import of employee records, as follows: var cts2005 = new Cts2005Entities(); IEmployeeRepository repository = new EmployeeRepository(); foreach (var c ...
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0answers
37 views

Faster accessing local variables vs member variables? [closed]

Possible Duplicate: C++ performance of accessing member variables versus local variables I was always under the impression it was much faster to access local variables on the stack, than it ...
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2answers
61 views

how to fast Insert 4,500,000 record into sql server database with c#

I have a program in c# that Insert 4,500,000 record into sql using ExecuteNoneQuery and take too long to insert I need a fast way to insert that take maximum about 10 minutes however when I insert ...
0
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2answers
27 views

Improve Performance of Image based application

We are working on a product based application. Where their are lot images are used in it. We want to improve the performance of the application. What best practices we can used to make it faster. We ...
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2answers
21 views

Rails ActiveRecord Performance with many Selects and Inserts

I have a Rails 3.2 application that tracks mailings for subscription orders. The basic model structure is: Order has_many Subscriptions has_many SubscriptionMailings Each month a record for each ...
4
votes
1answer
37 views

Does javascript have a blit or memcpy command?

I've build my own flip command and, well its slow and takes forever. I would like to know if javascript has a blit or memcpy style command. Right now I'm going through item by item with for loops to ...
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1answer
16 views

Performance of WebView in JavaFX

I have a HTML5 UI and a Java backend and want to avoid rebuilding the HTML ui in plain java, so my idea was to run a local webserver and use a webview to render it in a "native" window. The solution ...
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0answers
53 views

Why is the F# list a linked list rather than an array list? [closed]

Possible Duplicate: Why does F# prefer lists over arrays? It strikes me as odd that F#'s List module is implemented as a linked list rather than an array-based one (such as ...
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2answers
51 views

HTML + JS vs. HTML5 Performance

I was doing some experiments with HTML5 lately and noticed that HTML5 appears to run quite poorly on mobile, tablets, and even desktops. I conducted the following test: 150 elements moving across the ...
1
vote
4answers
85 views

C++: Listing the permutations of a string

I would like to ask all my fellow programmers regarding only efficiency. I am currently solving problems that could be asked in job interviews and I've come across with the famous permutations of a ...
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0answers
18 views

Color field in PropertyGrid ridiculously slow

I've got a PropertyGrid displaying an object, one of whose fields is a System.Drawing.Color. This makes the field on the PG automatically display a color, and if you click to edit it, you get a nice ...
1
vote
6answers
98 views

Hardware inspired loop. Nonsense?

The other day I've learnt a cool trick in Verilog. When you need to do something repeatedly. You could use a shift register to count the number of incrementation. Just shifting a 1 from LSB to MSB, ...
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votes
1answer
45 views

How to measure Java program system run time in Eclipse?

I'm trying to tweak the performance of a Java program of mine in Eclipse. At the moment I'm particularly concerned with run time. Right now I'm just using long startTime = System.nanoTime(); , ...

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