Recent questions tagged Performance

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performance - Best practice for keeping data in memory and database at same time on Android

We're designing an Android app that has a lot of data ("customers", "products", "orders"...), and we don't ... "why do you need to cache data?" See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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815 views

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performance - ZF2 Optimize for high traffic

My ZF2 application seems to be extremely slow when more than 3 users are using it at the same time. I ... connected user at the same time. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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777 views

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performance - Obsolete Java Optimization Tips

There are number of performance tips made obsolete by Java compiler and especially Profile-guided optimization. For ... in more modern JVMs? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - How do I remove unused resources from third-party libraries I’ve included on Android?

The third-party libraries that I link into my app often include resource files that aren't being used by my ... remove them from my build? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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601 views

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performance - Why is StringBuilder#append(int) faster in Java 7 than in Java 8?

While investigating for a little debate w.r.t. using "" + n and Integer.toString(int) to convert an ... have to answer these questions... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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861 views

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performance - Cached, PHP generated Thumbnails load slowly

Question Part A ▉ (100 bountys, awarded) Main question was how to make this site, load faster. First we ... Waterfall | http://gtmetrix.com See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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937 views

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performance - Visual Studio Build Very Slow

This applies to both 2008 and 2010 versions (and probably earlier ones too). Also to both C++ and C# projects. ... to fix it? Thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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864 views

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performance - WebSockets, UDP, and benchmarks

HTML5 websockets currently use a form of TCP communication. However, for real-time games, TCP just won't cut ... -level, direct socket protocol? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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639 views

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performance - Why is (a*b != 0) faster than (a != 0 && b != 0) in Java?

I'm writing some code in Java where, at some point, the flow of the program is determined by whether two int ... build 25.45-b02, mixed mode) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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707 views

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performance - Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?

Background: While optimizing some Pascal code with embedded assembly language, I noticed an unnecessary MOV instruction, ... by a compiler? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

1 answer

performance - Why does my Java application run so slowly in full-screen mode? (and fine when windowed)

I'm working on a Java program that is intended to run in full-screen mode. It uses numerous of customized Swing ... so, is there a work around? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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724 views

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performance - Efficiency for including files of functions (in PHP)

If I had a large number of functions would it be better to keep them all in one large file or would it be ... ('/functions/other_junk.php'); ?> See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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826 views

1 answer

performance - RAMdisk slower than disk?

A python program I created is IO bounded. The majority of the time (over 90%) is spent in a single loop which ... order to get faster file IO? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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632 views

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performance - SQL Server 2008 Running trigger after Insert, Update locks original table

I have a serious performance problem. I have a database with (related to this problem), 2 tables. 1 Table contains ... 1, '') Return @TEmp End See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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880 views

1 answer

performance - java compiler optimization

Is the Java compiler smart enough to optimize loop below, by extracting the Double average = new Double( totalTime / ... .sqrt( variance ); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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820 views

1 answer

performance - What is Android Things Raspberry Pi GPIO max frequency?

Where can be found the characteristics of the switching speed of GPIO port for the Raspberry Pi 3 under Android Things like that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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664 views

1 answer

performance - Optimize Speed of Recursive File Search in Subdirectories?

I'm looking for the fastest-performing method to recursively search subdirectories for a filepattern using an Excel macro ... " & target End Sub See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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720 views

1 answer

performance - Combining JavaScript files as recommended by YSlow - optimal size?

We have about 30 external JavaScripts on our page. Each is already minified. To reduce HTTP requests and ... the combined JavaScript files? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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657 views

1 answer

performance - Android execute a function after 1 hour

I have an android application where I am storing user's data on database when he/she activates the app. My app ... so. Please advice. Thanks :) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

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performance - Should I cache $(this) in jQuery if it is used more than once?

I know that you are supposed to cache the results of a selector if you use it more than once. An example would be: ... ); } process($(this)); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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705 views

1 answer

performance - Opposite of cache prefetch hint

Is there a hint I can put in my code indicating that a line should be removed from cache? As opposed to a ... up space for lines I do need. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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723 views

1 answer

performance - Which method is the least obtrusive for generating thread dumps in java?

I am aware of the following methods for generating thread dumps in java: kill -3 jstack JMX from inside the JVM ... to the JVM's performance? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

performance - Javascript Math.ceil(Math.abs()) optimization

I'm using Math.ceil( Math.abs( x ) ) inside a loop. Can anyone realize any optimization for this ... welcome to benchmark at jsperf.com See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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981 views

1 answer

performance - How can I freeze the execution of a program?

Say I have got a program that hogs the processor and/or hard disk to the point that it makes it nearly ... a service if that is necessary. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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858 views

1 answer

performance - How to profile a classic ASP web site?

I have a classic ASP (JScript) web-site that is running slow and are there any profilers that can help ... performance issues would be helpful. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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719 views

1 answer

performance - In Android; is it better applying an OnClickListener or use android:onClick?

Will the performance be any better using onClick? If I use onClick I do not have to set an android:id ... to concentrate on your application. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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789 views

1 answer

performance - What are ways of improving build/compile time?

I am using Visual Studio, and it seems that getting rid of unused references and using statements speeds ... references for distributed builds? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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828 views

1 answer

performance - Sparse vs Normal Array Matlab

In Matlab, at what point is having a sparse array better than a normal array if I still have a lot of ... of the array are non-zeros? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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