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

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1
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0answers
199 views

2-thread Perl program slower if run using a RAMdisk within a Virtualbox?

I run a perl script inside a Virtualbox (both the host and guest OS are Windows 7). The Virtualbox has been given 4 CPUs out of 8 (everything runs on a Intel i7) and 3 GB RAM (out of 8 available). ...
1
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1answer
1k views

Will the performance of a wifi router depend on the channel it is broadcasting on and the type of encryption?

Does changing the channel in which my wireless router broadcasts affects its performance? And will there be any affect if I change the type of security protocol I use (WEP, WPA2 etc)?
1
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1answer
1k views

Stop truecrypt from consuming all available physical memory

I have many truecrypt containers that contain random files that I am trying to consolidate into another set of containers that are better organized this time. To do this requires me to copy all the ...
2
votes
2answers
5k views

What's the reason aero turns off and then sometimes comes back again?

Just now it happened, and after a couple minutes it turned back on, which is not something that happened before. Before this I have only seen it turning off by itself and I had to restart it after a ...
7
votes
3answers
13k 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 ...
0
votes
1answer
276 views

Optimize graphics performance with (2) attached displays

I have a retina MacBook Pro and 2 cinema displays attached to it. If I unplug the displays I get quite good performance in games, obviously when they are attached that's not the case (because the VRAM ...
2
votes
1answer
144 views

Laptop having random and frequent slowdowns

So I have a Toshiba satellite with an i7 processor. It's under a year old and has been working fine until about a month ago. My problem is that no matter what I do with my laptop, whether gaming, ...
0
votes
1answer
610 views

graphics performance in ubuntu virtual machine running windows

i will keep this as simple as possible: My gfx card if radeon x1800gto. It's a decent card with decent gaming performance in windows. Right now, ubuntu does not get any newer proprietary drivers ...
3
votes
2answers
3k views

Why are SSDs so fast compared to raw NAND?

I used to work a bit with mobile devices containing raw NAND flash and noticed that it was pretty slow, with speeds somewhere around 7 MiB/s for sequential read and 3.5 MiB/s for sequential write. ...
4
votes
1answer
425 views

Is there a way to easily disable output to my second monitor to improve my video performance in a game?

I have a Radeon HD 5250 that has dual output. In a particular game that I'm playing, it's choppy even at the absolute lowest graphics settings and resolution. During that time, my second display is ...
1
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0answers
92 views

SSD vs HDD for file upload and reconstruct chunk file

Using HTML5, I will have an uploaded files roughly 2 - 10GB per client, uploaded to a server. The script will chunk each file into 100MB pieces, and reconstruct the file after everything uploaded into ...
1
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3answers
242 views

Toshiba laptop with Windows 7 is inexplicably slow?

I have a 3 month old Toshiba Satellite laptop with 4GB RAM, i5 processor and a normal HDD (not SSD). I dual boot with Ubuntu and I use Windows sparingly. However, I noticed that it is painstakingly ...
4
votes
4answers
5k views

Does installing a bunch of unnecessary fonts slow computers down?

Several sites and blogs advise users to remove the excess fonts from their OS. Does this help in performance or is this just a myth? If it is true, why is that so?
1
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0answers
105 views

SSD performance

I recently upgraded to a Kingston Hyper-X 120GB SSD, when I run Crystaldiskmark my scores look really slow, my MB (gigabyte 775) does not have an option for ACHI in the BIOS, I'm wondering if that's ...
-1
votes
3answers
351 views

Is the read speed of a SSD equal to or greater than the write speed? [closed]

Looking at the benchmarks of two SSDs on today's market, one by Samsung and one by OCZ, I noticed something interesting between them. Samsung had faster reads than writes. While the Vector had roughly ...
4
votes
1answer
813 views

Low FPS in some games, but hardware not fully used

I just did a little funny experiment in the game/sim "Train Simulator 2013". I normally have good FPS in it (around 30) at full settings. What I did was make a really, really long train so that the ...
1
vote
1answer
116 views

PC loading programs slower than normal after voltage change [closed]

I always turned on my PC at 220V, it always worked normally. Today I turned my PC at 110V and it was very slow to load any program. I turned it back on at 220V but it is still very low to load ...
0
votes
1answer
649 views

Windows 8 with slow internet connection

I upgraded a laptop from Windos 7 to Windows 8. Now there are some problems, but the most annoying is the following network issue: It is just slow and sometimes stops working. With Windows 7 I had ...
3
votes
1answer
265 views

How can I pin point a USB file transfer bottleneck in Unix?

I'm experiencing very slow data transfer speeds over USB 2.0 on my nix box and was wondering how I can pin-point the cause of the problem. I've looked into iotop and top but the cpu and mem figures ...
0
votes
0answers
203 views

Incredibly slow response when reading from mounted shared network (windows share) drive within Java application

I wrote a Java application that checks and indexes huge archive files. When i test it on my local machine, everything is speedy and works like a charm. However, i need to process large quantities of ...
1
vote
3answers
4k views

How to fix repair a 20GB windows directory

I found out my Windows 7 installation which is more than a year old has a bloated Windows (C:\Windows) directory (20GB). Correct me if i am wrong but i don't think this is normal. Is there a way i can ...
2
votes
1answer
276 views

Compare HDD and SSD performance

I have just ordered my first SSD, and I want to run some tests on my current HDD now, and then run the same tests again once I get my SSD up and running in a couple of days, so I can see in detail how ...
1
vote
1answer
4k views

XAMPP: Requests take far longer when connecting to a MySQL database

I'm developing in PHP and MySQL locally using XAMPP on Windows. The web site is fairly fast when not connecting to any database. However, when I connect to the MySQL database, a simple request now ...
2
votes
0answers
693 views

nfsstat authrefrsh almost equal to calls

I mounted a dir from my server through nfs (v3) on my LAN and if I run nfsstat I get # nfsstat -rc Client rpc stats: calls retrans authrefrsh 2527772 0 2527782 Is this ...
1
vote
0answers
997 views

Poor VirtualBox performance on Windows 2008 R2

I'm running a Ubuntu Server VM on a Windows 2008 R2 host, and I'm getting very poor I/O performance. See the following screenshot that shows my processes are severely I/O bound (i.e. 96.0% wait) ...
0
votes
1answer
638 views

slow down computer when i installing something

Every time I just go to the process of installing something (game or software, but game is more) my speed of computer goes down! It's not important what I opened, it need much time to open. I have ...
0
votes
1answer
104 views

Calculating dual core performance (GF/s)

I'm trying to figure out how to calculate performance (measured in GFLOPS) My thought was I would use GFLOPS = cores x clocks x (FLOPs/cycle), my issue right now is that one of my cores runs at a ...
0
votes
0answers
470 views

How to avoid slow startup / OSX won't save spotlight index?

Lately I've been having issues with osx taking a CRAZY long time to start up. Every time it does start, I have this hunch that, considering how hard spotlight is working after startup, that it might ...
0
votes
0answers
160 views

Bluray Burner suddenly disappeared from Windows and very slow boot

Very fast computer with raid 0 SSD's used to boot very quickly, but recently I tried to burn a disc but couldn't find the drive anywhere, device manager, show hidden devices, disk management, NO where ...
0
votes
1answer
2k views

Merging multiple log files to one single log file

I decided to monitor a remote computer (XP SP3) by gathering information with a performance monitor application. After five days, I stopped monitoring and had 6 log files created by Perfmon. My ...
17
votes
5answers
27k views

Windows is very slow with my new SSD

I have a laptop HP probook 4520s with Core i5 M480 @ 2.67Ghz, 4Gb RAM, 640 GB HDD Radeon HD 6370m 1GB video card. It would seem like a good stack for work, right? But My HDD has ...
2
votes
1answer
149 views

Why system still hangs/slows after process is finished?

My OS is Ubuntu 12.10 64 bit. I have experienced this issue for a long time, with all previous versions of Ubuntu as well. If I launch a process, which takes up all the memory and when finished, the ...
3
votes
2answers
182 views

I can only access Google from CentOS

I'm using the CentOS 6.3 Live DVD x64 version; however, I can only access Google and IPs living on my LAN (haven't tested external IPs) in Firefox and Konqueror. Yum can't access mirrors as it claims ...
0
votes
1answer
1k views

How to diagnose reason of blocking in fltmgr.sys (HDD access slow) in Windows 7?

My Windows 7 PC is blocking quite often for a couple of seconds up to half a minute or so. I tried to find the problem with the process monitor by filtering all system calls that take over 2 seconds ...
0
votes
0answers
204 views

Sites with Google Maps slowing to a crawl

In Chrome (and, strangely, also in FireFox to a lesser extent) I'm having a problem with sites that use Google Maps: GMaps itself, Bikely, Strava etc. After a while, rendering of the map gets ...
0
votes
1answer
409 views

Terrible write speeds with Z77 Intel 510 RAID 0

I just bought an Asus P8Z77-V Pro board today, connected my old Intel 510's in RAID 0 mode on the Intel controller and installed Windows 7. I'm gettings read speeds of around 900mb/s, but the writes ...
2
votes
1answer
245 views

Rebooting Windows 8 takes longer than startup from power-off

When I use the restart option in Windows 8, it takes longer to shut down and reboot then if I had used the manual shutdown and manual power on. I use an SSD and UEFI, and it happens on both of my ...
2
votes
3answers
7k views

Computer running very slow after new RAM installed

Operating system: Windows 7 32-bit (i'm aware of the 4gb RAM restriction here) Display Adaptor: NVIDIA GeForce GTX 460 vram 1gb Processor: AMD Phenom(tm)IIX4 965 HDD: Hitachi HDS723020BLA642 ATA ...
2
votes
1answer
241 views

Samsung 830 256GB ridiculously slow with SATA1

I'm well aware that my 6 years old laptop with it's SATA1 bus can't fully benefit the new Samsung 830 256GB SSD. It's OK if it's the bus that caps the transfer speeds. SATA1 is fast enough for me. I ...
5
votes
2answers
3k views

SSD Copy gets slower and slower with large files

I have a OCZ SSD drive, and I was duplicating a 16GB VM on the drive and noticed when I started the copy it was working at approximately 180MB/s, by then end of the copy this had dropped to ...
10
votes
2answers
5k views

Poor gaming performance with hyper-v installed in windows 8

I am getting very poor gaming performance on my Windows 8 host OS with Hyper-V installed but no guest machines running. For example World of Tanks reports 60-70 FPS without Hyper-V installed and 4-14 ...
1
vote
1answer
835 views

FPS dips periodically when playing games

Certain graphically intensive games I play tend to exhibit stuttering on my computer, and I don't know why. The stuttering is usually in the form of FPS "dipping" for a fraction of a second, to a ...
4
votes
2answers
1k views

Is there anyway to simulate Windows 8 running off a microSD card? (Limit the I/O speed)

I would like to install and boot Windows from a microSD card using the Nifty MiniDrive, however, before I pay for the device and microSD card I would like to see the performance differences between ...
1
vote
0answers
2k views

System halts for a fraction of second after every 2-3 seconds

I'm using Windows 7 on my HP ProBook 4250s. The problem I face is that my system halts for a fraction of second after every 2-3 seconds. These jerks are not letting me concentrate or work properly. ...
1
vote
1answer
3k views

How to fix audio/game stuttering in Google Chrome's Flash plug-in? [duplicate]

Possible Duplicate: How to fix skipping/stuttering audio in Google Chrome I'm having an issue. Windows XP, running the latest Chrome 23 build. I'm using Flash 11.5 built into Chrome (Pepper ...
2
votes
1answer
231 views

Windows 7 64-bit Random Slowdown when developing C/C++ Applications (any IDE or Compiler), Installing or Searching for WIndows Updates, etc

I originally posted this on stack overflow and realised that it was OT for there. I hope it is not an OT here as well. My problem first started when I was using an Open Source C/C++ Library called ...
2
votes
2answers
542 views

Passing links (http, mail…) between applications is slow

I have recently noticed that whenever I click a HTTP link in an application (my mail client for example which is Windows Live Mail), My standard browser opens like only 15-20 seconds later. It also ...
27
votes
2answers
3k views

Why are start-up times faster on Windows 8? [closed]

A few people have done benchmarks comparing Windows 8 to Windows 7. Many features don't improve, but consistently, startup time is better. Why does Windows 8 start up faster compared to Windows 7? ...
1
vote
3answers
2k views

Does a dedicated video card improve HTML5 websites, Skype or Flash games performance?

I have read that having a dedicated video card (GPU) improves performance if you use your computer to play video games. I guess to make this happen, video games or apps must be using especial ...
1
vote
2answers
652 views

Is my SSD performing poorly?

Recently I've noticed that my SSD, which is a Crucial model CT128V4SSD2, is performing really really poorly. I took a benchmark test and here's the result: In addition, I noticed from the Task ...