For questions concerning computer, or computer-related, performance. Please include metrics in your questions.

learn more… | top users | synonyms (3)

-2
votes
0answers
23 views

Performance with HHVM on Apache and nginx

I had a new Ubuntu server, and I want some opinions on the web server. I am developing with PHP, and stuck between Apache and nginx. I have used WAMP without problems, but in this case, I want to ...
0
votes
0answers
15 views

Any tip to improve Java desktop programs' UX

Java-based Desktop programs are generally slow on start-up and laggy during run-time (e.g PhpStorm, …). Is there any way to enhance their performance?
8
votes
7answers
34k views

TiWorker.exe - Very High CPU Usage

I have a laptop running Windows 8. Although it originally ran well, it started having very bad performance issues. I decided to perform some research into the topic. Opening up Task Manager, I ...
0
votes
0answers
18 views

Why does my system show lots of memory being used when the total amount is way less than reported? [duplicate]

I don't know if the title makes sense but Windows reports 7GB of memory being used but when I check the task manager I don't anything close to this amount being used. Here is the pic where the apps ...
0
votes
0answers
22 views

HDD activity causes lag

Whenever there is activity on the main HDD, my PC starts to lag. Most noticeably, the audio starts to stutter and slow down, and the fps in games drops by over 50%. It gets worse as hard drive ...
0
votes
1answer
23 views

How can I troubleshoot poor wifi performance?

I recently installed a new Gateway combined modem/router from Comcast/Xfinity. Since then 3 of our devices (Macbook Pro, 2 iPads) connect fine but the other (3 year old HP laptop) exhibits the ...
0
votes
1answer
51 views

Unexplained RAM usage

I have had my MSI GT70-20C laptop for almost a year now but recently I have been having trouble with performance drops due to the over use of memory. This occurs when i start doing activity or even ...
1
vote
3answers
42 views

Optimizing JavaScript Files

When a JavaScript file is sent over an HTTP connection, the entire file is sent, and then the preprocessor on the clientside will deal with the rest? Therefore, would removing comments and whitespace ...
2
votes
1answer
4k views

BootCKCL.etl file size & Session “Circular Kernel Context Logger” stopped due to the following error: 0xC0000188

I have a few regular / re-occurring errors in my event viewer which seem to be linked to logging upon boot and shutdown. I am running Windows 8 x64 professional. Event ID 4: The maximum file ...
0
votes
1answer
2k views

ext4 vs btrfs performance on SSD array

I am observing something that I cannot explain. I am trying to come up with a good filesystem configuration using HP P420i controller and SSDs. Out of curiosity I have tried BTRFS (still unstable so I ...
0
votes
1answer
21 views

Why is different throughput using netperf?

I am using netperf on Windows OS, with two computers connected with cross-over cable. First PC is using a Realtek FE network controller, and second PC has a Realtek GBE controller. With the first PC ...
3
votes
2answers
308 views

Performance difference between SD and MicroSD cards?

If you compare a MicroSD card with an advertised speed of 48 MB/S to a full size SD card with an advertised speed of 48 MB/S (from the same manufacturer), should their performances be identical? Or ...
0
votes
3answers
12k views

What can I do to make my VPN connection faster?

I am using hideman as my VPN, however I found that my internet browsing speed was significantly degraded when I was using VPN. I used speedtest.net without VPN and I got 5Mbps, and when connected to ...
1
vote
1answer
2k views

Flash stream makes my internet slow and cpu rush

When I try to watch a live Flash stream, my CPU usage goes up to 75% and my Internet speed goes down. If I run a test before the video-stream, my speed is ~40/10Mbps and during the stream it drops to ...
47
votes
8answers
61k views

How can I produce high CPU load on a Linux server?

I’m currently in the process of debugging a Cacti installation and want to create CPU load to debug my CPU utilization graphs. I tried to simply run cat /dev/zero > /dev/null, which works great ...
0
votes
1answer
31 views

Performance of SSD w/ less RAM vs SATA w/ more RAM [closed]

Time to upgrade to a new development laptop. I'm trying to maximize performance which will include multiple virtual machines and android development. I believe there are 3 issues that will ...
1
vote
0answers
43 views

Is there a way to create “logical” monitors without sacrificing performance?

I'm in an odd situation, where it would be beneficial to be able to take a single 3840x1080 monitor and have Windows treat it as if it was actually two 1920x1080 monitors - one as the Windows ...
21
votes
4answers
70k views

Windows 8 extremely high disk usage and slow IO

Problem After upgrading from Windows 7 to Windows 8 Professional, there seem to be a few disturbing problems. When I have the Task Manager open, I sometimes notice the disk usage climbing to 50, ...
0
votes
4answers
2k views

Low disk performance with Windows 8.1

I have a Dell XPS 15 (L502X) that have a Core i5-2450M, 6GB RAM and a 1TB WD 5400RPM HDD. This notebook Achilles' heel is the disk. It's slow and I understand that if I do stress it to much, it lends ...
0
votes
0answers
44 views

NVidia performance tab under control panel on windows 8.1

I see that I have usual problem with performance tab, but I don't find solution with windows 8.1. The problem is that after I install all NVidia drivers on "clean setup" mode I have NVidia control ...
0
votes
0answers
34 views

Where to put “VirtualBox VMs” folder and “iso” files for optimal performance

Just installed VirtualBox for the first time. The host is a Windows 7 OS machine with 8GB of RAM and i7 CPU. I bought an SSD drive (Samsung 840 EVO) specifically to have better performing VMs. My ...
0
votes
1answer
21 views

Annoying Fan noise vs slow down

I was in a situation where when I would scroll or navigate through Google Drive, there would be a slowdown while a fan that had been silent revved up. It would also keep me awake at night. So today I ...
2
votes
0answers
33 views

What factors would cause java based programs to load very slowly? [closed]

I am at a loss here. I am trying to help someone get on my Minecraft server. He is the only one having trouble and I am not able to find a reason why. Basically we have 8 people on this server and ...
12
votes
5answers
8k views

Extremely slow internet speed after reinstall

I have recently had a hard drive failure so I was forced to reinstall my OS (Windows 7). After a fresh install, I noticed the internet speed became extremely slow (~15 minutes for downloading a 20MB ...
1
vote
2answers
559 views

Do several installed fonts on a system affect system performance or boot time in Windows?

Earlier it was common to believe that many (never seen defined what many means) fonts will slow down windows. Is that still a valid issue on today's hardware with Windows Vista/7? There are some ...
3
votes
3answers
5k views

What is an XPerf alternative for Linux and Mac OS X?

XPerf is a tool that allows you to take a detailed trace of various system activity like CPU, I/O and more... Because of it's detail you can see stack trace counts, disk position offset graphs, ...
0
votes
0answers
32 views

Laptop starts to lag after some time [duplicate]

I've HP Pavilion 15 and It's been working all fine ever since i got it last October. It started to lag weirdly earlier today. When i open heavy applications or a game, mouse cursor starts lagging, ...
0
votes
1answer
25 views

Is “lag” just a part of Windows remote desktop? (“Can I work remote with nearly no lag?”)

I use Windows Remote Desktop to connect to my physical workstation at the office -- I remote connect from home where I have (conservatively) 16 Mbps Down and 6 Mbps Up. It's not that I experience ...
46
votes
16answers
94k views

How do I troubleshoot a Windows freeze or slowness?

A machine is described as being "really slow" or "freezing". How can I troubleshoot/resolve this issue? What should be the first steps to take?
0
votes
3answers
3k views

Slow internal disc to disc file transfer speed

I ran the HDTune drive monitor while I was transfering about 80 GB of various sized files, most of which was running about 40 MB/s, but you can see where it spiked down to under 1 MB/s. ...
42
votes
12answers
48k views

How can I produce high CPU load on Windows?

For testing purposes I need to generate high CPU load on a Windows Server 2003. I cannot install any software but have to make do with what Windows provides. What would be the best way to achieve ...
1
vote
0answers
60 views

Chrome is really slow on mac

I have Yosemite, 16GB Ram. Chrome started to work really laggy. You can feel the lag while scrolling a basic google search page. Till now I tried: Disable all extensions for incognito mode. But even ...
1
vote
4answers
3k views

HP Probook 4530s great specs, but lagging. Hard Drive?

I have this laptop, which has a i3 processor, 4gb memory, 7200rpm hard drive. So there is nothing wrong with the specs. Even when I have no applications open, simply closing and opening windows, ...
0
votes
0answers
24 views

Running Linpack on Linux High performance computer

I am trying to do some benchmarks on Linux HPC machine which specs are as following Total CPUs: 160 cores using latest 16C AMD Opteron Processors Total main memory: 640 GB of 1600MHz Total GPUs: 1024 ...
3
votes
0answers
107 views

Extreme FPS Drop in Counter Strike Global Offensive [migrated]

Please don't provide answers/suggestions on how I can improve/squeeze out more FPS. I want to know what caused the FPS drop and tearing. Thanks! Yesterday, I noticed a significant FPS drop ...
0
votes
0answers
48 views

Intel turbo boost falls back to default 2.4GHz just when it's needed most. How can this be resolved?

Intel Turbo Boost has my laptop running at 3300 MHz most of the time. My power settings are maxed out, so it stays there most of the time while I'm browsing the Internet and stuff, but once I run a ...
0
votes
2answers
3k views

Windows 7 very slow for web browsing- all browsers affected - what to check?

My wife has started to find her Windows 7 machine is running very slow for web browsing. This seems to have come on over the last few weeks, previously there wasn't a problem. It doesn't seem to be ...
5
votes
1answer
5k views

High Disk I/O and CPU usage of System Process in “System Volume Information”

I've a problem with high disk IO and cpu usage from the system process. With the performance monitor I can see that it writes and reads about 100MB/s froM "System Volume Information". I tried to get ...
1
vote
3answers
8k views

Big Excel File Freezing/Running Slowly

My co-worker has a very large Excel file (over 7 MB) that suffers from the problems of (A) running slowly (B) taking forever to open/save/close and (C) freezing the computer, requiring a restart. I ...
17
votes
6answers
25k views

What regulates Intel SpeedStep CPU throttling? Can I get some control of this on Windows7?

I’m trying to get a big virtual disk file compressed (using WinRar) before I go home today, but my CPU frequency keeps merrily going up and down between the nominal 2.8 GHz and a measly 800 MHz! The ...
2
votes
1answer
125 views

Windows 8.1 CPU utilisation never exceeds about 30%

I'm writing a C++ application using Visual Studio 2013. The application iterates through an image doing some complicated analysis. The analysis is not particularly slow, but in order to test code ...
0
votes
1answer
73 views

Why is my disk usage 100% on startup on a Lenovo Notebook E540 running Windows 8.1 Pro 64bit?

I have a Lenovo Notebook E540, with Windows 8.1 Pro 64bit and with each startup the system will be almost stopped for more than 15 mins. When I checked the task manager, I found out that my disk ...
0
votes
1answer
34 views

How to run typeperf from batch file?

How to run commands like typeperf "\Process(*)\% Processor Time" -sc 1 from batch file? Ran from command line this command outputs something monstrous, while ran from bat file it prints Error: No ...
3
votes
0answers
285 views

Copying from WHS 2011 backup very slow

I'm setting up a new computer to replace one of my old ones, and part of doing so is extracting my Home folder from a backup I made just before wiping the old one. However, copying from the mounted ...
0
votes
1answer
1k views

Large file copy from NFS to local disk performance drop

I'm trying to copy a 200GB file from an NFS mount to a local disk. The local disk is an XFS filesystem on a LVM on top of a RAID 5 system (hardware RAID controller). I'm using rsync to monitor the ...
7
votes
1answer
319 views

What do different patterns mean in Windows 8 file copy dialog

When copying or extracting files, Windows 8 shows the chart with the speed of the operation. I noticed several patterns: Randomness, High speed at the beginning, then low speed during the most part ...
1
vote
4answers
2k views

Why is the Core i5 5300u rated better than the i7 5600u?

I just purchased a new x1 Carbon with all the bells and whistles. I got a Core i7-5600u which I really thought would be the better chipset to get. But now I'm looking at some benchmarks and the ...
4
votes
1answer
4k views

High CPU usage by dwm.exe when nothing is happening

Setup: Windows 7 Ultimate, running in a VMware box inside Windows 8, VMware Tools installed; VMware Workstation is the only application launched in win8). Aero is on. Starting a few months ago, on ...
0
votes
1answer
37 views

Bench-marking my SSD gives unreasonable number

I have a SAMSUNG 840 EVO SSD (120GB) installed on my laptop. According to the SAMSUNG website, it has 520 MB/s max read and 500 MB/s max write (sequential). I am trying to benchmark it using ...
7
votes
3answers
9k views

Increase Outlook 2013 performance?

I feel that Outlook 2013 (compared to Thunderbird) is quite slow at e.g. changing between mail view and calendar view - is there any way to disable e.g. the animation of the transition between mail ...