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

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4
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0answers
239 views

Stutter while gaming every 3-4 seconds in Windows using MacBook Pro 2012 (MacBook 9.1) using Windows 7

I'm using Windows with Bootcamp on my Mid-2012 MacBook Pro (Here is the config). Recently when I play a game, I get frequent (and somewhat constant) stutter every 2-3 seconds, no matter if it's a 2D ...
4
votes
0answers
300 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 ...
3
votes
0answers
501 views

LSI SAS 2308 MPT2SAS Linux Read/Write performance

LSI SAS 2308-8e (6Gb/s per Lane) PCIe 3.0 card. Average Read/Write Raw performance for 4 SSDs is very low around 430 MB/s (Expected 2 GB/s).I am having Intel Core i3 with quad cores and 4 GB RAM. ...
3
votes
0answers
366 views

Poor write performance on ecryptfs

I did a bit of benchmarking with ecryptfs and dm-crypt, and got some interesting results. All the following were done with a Btrfs filesystem, using dd to copy a ~700MB file to/from a ramdisk with the ...
3
votes
0answers
2k views

Windows 8.1 Process Migration Limits CPU frequency scaling

Summary: I've noticed that with Windows 8.1 on my laptop, running a single CPU intensive program does not cause the CPU frequency to scale to its maximum value. I suspect that this is because of ...
2
votes
0answers
90 views

explorer.exe, windows 10 slow login with one user

I have 3 users on my computer using Windows 10. One of them recently became slow to login (6 seconds instead of 2). I looked in event viewer and both users have the same history when loging in. It ...
2
votes
0answers
30 views

Can CPU performance be permanently be degraded by running at high temperatures?

My question is specifically if a processor can perform worse after extended periods of being too hot. I've had my laptop for four years and my cpu would regularly get to 85C+ watching videos or using ...
2
votes
0answers
130 views

Intel RST driver - magic performance boost (only) up till version 11.2.0?

what's the magic behind the massive write speed performance boost by intel RST drivers up till and including version 11.2.0? i have done some performance measurements of my application that is ...
2
votes
0answers
55 views

Wrong total ram ( 8 GB installed, 4 appears and used in total )

I have this motherboard: GA-X38-DQ6 which can hold up to 8 GB of Ram. When I got this computer it had 4 memory sticks, 1 GB each, and everything was fine. Now, I have two sticks, 4 GB memory each: ...
2
votes
0answers
376 views

MIcro SD card gets slower after partial fullfillment

I have a micro SD card from Kingston - 32GB class 10 When i'm writing on it using usb card reader or my phone, average write speed is about 6MB/s But after about 10GB of data written into it, ...
2
votes
0answers
438 views

How to force the Linux kernel reclaiming cache memory rather than using swap?

I have a PostgreSQL-driven web service on two Debian servers, one a vhost running Linux kernel 3.2.0-2 with 2GB RAM and the other a dedicated server running Linux kernel 2.6.26-1 with 6 GB RAM. ...
2
votes
0answers
564 views

HDD very slow performance after full copy from SSD

The PC: Core i7-4770, 16GB RAM. There are 120GB SSD and 1TB HDD (new without any bads). On the SSD I had Windows 8.1 installed with all other stuff. Someday all programs exceeded 120GB limit and I ...
2
votes
0answers
152 views

Show dial up connection status in Task Manager

In Windows 8.1, Task Manager shows Wi-Fi, Disk, CPU usage graph in Performance tab. But, it doesn't shows usage of a dial up internet connection. How can I add dial up stats in task manager. Here are ...
2
votes
0answers
122 views

some programs running much slower after mscvrt runtime redistributable delete/reinstall

UPDATE: It appears that there may have been an unfortunate coincidence. It seems that right around the time I was doing these builds and deletions of redistributables, my laptop power adapter was ...
2
votes
0answers
312 views

USB Keyboard and Mouse slow to activate using docking station for Lenovo T430

I just recently upgraded to a T430. Happy with the laptop but one thing I find annoying is that when I use it through the docking station - it takes several minutes ie 3-5 for the USB keyboard and ...
2
votes
0answers
175 views

What desktop computer hardware specifications are most important for database heavy applications?

I am purchasing a new personal desktop computer with the hope of improving performance for database-heavy applications (mostly data mining). I will want versatile hardware for all sorts of future ...
2
votes
0answers
603 views

Too much disk activity READING event logs

On Win 7 SP1 x64, I notice that sometimes the disk gets so busy that Windows becomes unresponsive for minutes at a time. I referenced this problem on SU in the past once. I've since replaced the ...
2
votes
0answers
444 views

Super slow SDD write speeds with RAID 1

I have a very new computer system, configured in RAID 1, but was surprised that the write speeds were extremely slow! Here is a snapshot of my computer setup: Motherboard: Asus Z9PE-D8 WS ...
2
votes
0answers
166 views

How much performance reduction is ok for a linux router?

I am having thew following (simplified) setup: I have a private Subnet where my PC is located. The subnet goes over a virtualized server into the internet. The server uses internally two subnets: One ...
2
votes
0answers
357 views

Problems with buffered disk read performance

I have two identical linux boxes (running ubuntu 13.4) with identical hardware including a WDC WD20EARS hard disk. I noticed that my main system got unsually slow and performed a number of HD tests. ...
2
votes
0answers
942 views

Buffalo Router WZR-HP-G450H slow and unstable

I bought a Buffalo WZR-HP-G450H router. Problem 8 device connected to it via wireless. When power it on, the connection speed is very fast, about 5MB/s while transfer files between a wired server ...
2
votes
0answers
101 views

Low bandwidth only on Windows XP

Hi I own really old PC and I've 10Mbps/1Mbps Plan. Internet is distibuted with router over whole house. The old PC uses 802.11b (up to 11Mbit/s download) Wifi card and has Windows XP+SP3 installed. ...
2
votes
0answers
542 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 ...
2
votes
0answers
933 views

When tab groups are loaded, Firefox becomes unresponsible for minutes (Unresponsive script)

I have several tab groups (~ 20) in Firefox. I can start the browser without any problems. However, as soon as I … click at the "Group tabs" icon in the toolbar, or right-click on a tab and hover ...
2
votes
0answers
317 views

Improving Chrome performance on OSX

There are a number of sites that do not display properly on Safari and I need to switch to Chrome. Although when the content of the sites requires flash player, Chrome will consume a significant ...
2
votes
0answers
403 views

Microsoft Security Essentials: keep download scans but disable local activity scans

In Microsoft Security Essentials, I used to disable "Monitor file and program activity on your computer" but enable "Scan all downloads." Now, Microsoft Security Essentials (MSSE) 4.0 removed the ...
2
votes
0answers
74 views

Which Windows services and startup programs can I disable/modify to optimize performance/security?

For Windows Vista SP2 and Windows 7: I use this stand-alone (no LAN) computer at home exclusively to browse the internet, nothing else!.. I have another computer I use for development and testing ...
2
votes
0answers
109 views

Laptop is super slow on network

So on our network we have a bunch of wireless macs and window Operating laptops, we have a network setup with 802.11g,b,n. All the laptops seem fine except one which is only getting speeds of 54Mb. I ...
2
votes
0answers
99 views

Have anybody tested R multicore packages on 10-core Xeon how do they scale in comparison with case of 4 core machine?

Have anybody tested R multicore packages (for example : parallel, multicore, snowfall, foreach) on 10-core Xeon ? How do they scale in comparison with case of 4 core machine ? What algorith have you ...
2
votes
0answers
929 views

Can I disable Windows 7's indexing/scanning of dvd contents?

When I try to copy data from a DVD on my Windows 7 machine, I keep running into this problem. I open the DVD drive in windows explorer to browse the files, select the ones I wish to copy then paste ...
2
votes
0answers
45 views

Are there guidelines for the performance implications of adding multiple usb/firewire drives to a Mac?

I have noticed that I get a significant performance drop on a Mac Pro with more than 5 daisy chained firewire 800 drives. Task switching grinds to a halt, and the machine often beachballs between ...
2
votes
0answers
880 views

PowerPoint really slow for A0 size poster; how do I speed up?

I'm making a poster of my physics research project for a conference. I don't have time to learn LaTeX at the moment, and I need to be able to type inline equations within text boxes - the only ...
1
vote
0answers
26 views

Performance Gain From Excel 2007 to 2010/2013 for modern PC

My work recently upgraded my department’s computers to shiny new spiffy i7 ssd 16GB RAM boxes. I spend most of my time in excel/access and the company still uses the 2007 versions of this software. ...
1
vote
0answers
50 views

Windows 10 keeps showing 100% of CPU usage no matter what

I'm having a curious issue in my Windows 10 Pro 64: the task manager keeps telling I'm using 100% of CPU no mather what: it's just there, fixed, doens't matter which are the consumptions of the listed ...
1
vote
0answers
87 views

Internet Explorer 11 became very slow after upgrading to Windows 10 plus some updates

Recently I updated my Windows 7 x64 to Windows 10 Pro x64. At that time I used Internet Explorer 11 and it worked fine. But yesterday I open it again to access the same website of before (the Banco ...
1
vote
0answers
14 views

Speeding up USB 3.0 on my machine, Vantec USB3.1 to PCI card is slower than MOBO ports?

So I read an article on Tom's Hardware after I was tired of waiting for some backups to complete faster. Admittedly I did not understand parts of the article but what I took away from it is that I ...
1
vote
0answers
14 views

How to increase performance of Adobe Creative Suite 6 via hardware upgrade?

A friend (who doesn't have a SO/SU account) has had a licence of Adobe CS6 for some time. Mostly uses Photoshop and InDesign. He doesn't want to upgrade to Creative Cloud for the reasons such as ...
1
vote
0answers
33 views

Strange colored flashing boxes appearing at the top left in games

A few days ago I configured/tuned my graphics settings (HD 5970, a Dual-GPU Card) because I noticed that all games my second GPU was idling (noticed it thanks to GPU-Z/MSI Afterburner). At some point ...
1
vote
0answers
53 views

Acer Laptop Performance Loss Plugged in

A few days ago I acquired a Brand New Acer Aspire E 15 E5-571-74AP laptop, and found a frustrating problem. Whenever the laptop is unplugged, the performance on games and other programs is stunning. ...
1
vote
0answers
47 views

Computer suddenly became slow?

I am using Fedora OS on my Desktop. Normally, I always leave my computer on and access with teamviewer remotely. Last week my computer was on for 7 days, and after I start using it I have discovered ...
1
vote
0answers
124 views

QCA9565 / AR9565 Slow at some distance

I'm having trouble with an Dell Inspiron 14 5447 Wifi using Ubuntu 14.04. It's an QCA9565 / AR9565 Wireless Network Adapter. When I'm at 4 meters distance of my wireless router, it works fine, as ...
1
vote
0answers
382 views

svchost.exe (LocalServiceNetworkRestricted) uses excessive RAM on startup

I'm running Windows 8.1 on a Lenovo Ideapad Yoga 13 with a Core i5 CPU and 4 GB of RAM that I bought July of 2014. Though I have had a good experience, there's one problem, as you can see from the ...
1
vote
0answers
68 views

Samsung 830 256GB SSD dying?

I have a decent fast Computer (i7, 32 GB RAM, SSD, ...), which worked flawlessly for a year now, but about over a week ago the access rates just went bananas (well, very slow like on HDDs). Just some ...
1
vote
0answers
53 views

WPA shows NIC driver DPC fragment running for 232 milliseconds

I'm stress testing my UDP proxy on a machine with 8 logical CPUs. At around 14 thousand UDP clients, one of the CPUs (CPU 4) starts spiking and UDP throughput (as shown by Task Manager) plummets to ...
1
vote
0answers
98 views

Why is computer slow in switching between opened applications?

I like to open a lot of Chrome tabs, but when I try to switch between open tabs, the tab tends to re-render. When I have some other applications open alongside with chrome, those applications also ...
1
vote
0answers
94 views

How to measure a HDD's RPM speed?

EDIT: My original intent with this question was to figure out if it would be worth purchasing a 7200rpm drive if mine turns out to be 5400rpm, but JakeGould has made it clear that RPM alone is not ...
1
vote
0answers
79 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 ...
1
vote
0answers
67 views

How to defragment or minimize a “directory file” on ext4?

I have quite an old home directory on HDD. There were lots of files created and removed and now the size of /home/username is 995328 bytes. Please note, I mean the size of the "directory file" (every ...
1
vote
0answers
224 views

Why Computer is so slow after boot?

This situation has happened to me multiple times and I've tried to diagnose the problem unsuccessfully. This has to deal with my work PC. Machine/Software Specs: Windows 7 x64 32GB Ram Core i7 (ivy ...
1
vote
0answers
131 views

“Access is denied” to Admin when using Sysinternals Contig to defrag the $LogFile metadata file

I have folders with hundreds of thousands, to over a million files and subfolders in each parent. I'm reading that the NTFS log file may be responsible for slow file creation and other actions. How ...