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

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Why is the Windows 7/8 translucent selection so laggy?

In Windows 7 (and 8), the translucent selection rectangle is getting slower, 'laggier' as the selection area gets larger. For example, creating a selection area of roughly 1500 x 1000 pixels on the ...
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0answers
36 views

Computer slow when there is over 8GB RAM

My motherboard is a Sapphire pure black X58, with 6 ram slots ( tri-channel ) and 3x 2GB G.Skill PC12800 PI series on them, and when I received for free 6x 2BG G.skill PC12800 NQ series I wanted to ...
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0answers
30 views

Slow startup due to event log

My computer takes roughly 10-15 minutes to startup. I found that if I disable Windows Event Log in msconfig that startup is normal again. This is on windows 7. I am guessing that the event log is ...
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2answers
35 views

How to get a “picture” of the computer cpu/disk activity while in a fullscreen application

I have a small issue on my computer. From time to time, it seems like some process is turning on, maxing the cpu and disk activity for 10-15 seconds, and then stopping. This usually occurs while I'm ...
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0answers
11 views

About Connection Speed

I have this problem for months and I couldn't solve this. It's really weird problem for me. I have a cable modem NetMaster and additionally TP-Link Router (to extend wireless area). There are three ...
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2answers
53 views

slow transfer of data from disk to disk

I'm copying about 4TB of data from one hdd to another and noticing abysmal speeds. I have two external SATA 3 hdds plugged into USB 3.0 docks and connected to USB3.0 ports on Macbook Pro. MBP was ...
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2answers
21 views

How to automatically store DNS entries locally after first visit, for for privacy and speed reasons? [duplicate]

My set of websites that I visit regularly is not very large. In order to increase privacy, I'd like to visit these sites directly without the need of a remote DNS resolve each time I visit it, but I ...
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1answer
130 views

Centos running very slow in Virtualbox

I am running Centos 7 in Virtualbox 4.3.14. The VM is configured with 2 CPUs 4 GB RAM 3.10.0-123.4.4.el7.x86_64 kernel The host machine is running Windows 7 Pro SP1 64-bit Intel i7-4790 CPU, ...
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3answers
117 views

Network speeds degrade with time

I bought an Asrock AM1B-ITX motherboard. It is working great, except for the wired download speed. When the machine boots up, it is close to the maximum the ISP provides me, but within a few hours it ...
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36 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. ...
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0answers
47 views

Windows 8: disk usage is always at 100%

I have noticed recently that my laptop runs slowly. Reason is (as I think) that disk usage is at 100% most of the time. It's also true even when running relatively disk-independent apps. What did I ...
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1answer
42 views

The more I use my computer the less it lasts?

I would like to know your opition about the relation between the following 2 variables and 2 outcome measures. The variables are: Time a computer/laptop is on, carrying normal tasks/processes (word ...
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50 views

Poor performance with Ethernet Network Card when transferring files

I am having a performance issue I have not been able to solve and hope you guys can help me with it. I bought a NanoPC (small computer with ARM processor) and I have it running Ubuntu 13.10. It has a ...
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0answers
27 views

Error on ubuntu server testing - “fio: first direct IO errored.”

I'm working on a VM to test caching algorithms. The tool I've chosen to push IO is fio (click for HOWTO) given its flexibility. What I don't understand is why running on this ubuntu server 14.04 image ...
52
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2answers
4k views

Why did adding memory significantly increase gaming performance on an AMD APU?

To be clear from the beginning, this is not a problem. This is just something that I really want to know the secret behind. System specifications CPU: AMD A10-6790K 4.0 GHz GPU: AMD ...
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1answer
102 views

Why does my computer run slow if it is not using most of its CPU or RAM? [closed]

I have two machines - a relatively cheap laptop and a high end desktop. My laptop sometimes runs slowly doing various tasks that would be quick on my desktop. My first guess is that I'm using most of ...
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0answers
37 views

USB mouse incredibly slow on brand new laptop

Just purchased a Dell Latitude E6540 with a ~16" screen (Windows 7). The mouse is terribly slow, even after adjusting it in Mouse Properties (Pointer Options -> Motion -> Fastest). To move the mouse ...
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0answers
27 views

Weird phenomenon about my PC's primary & secondary DNS speed

I use DNS Jumper to test the speed of various DNS and this is the result: (A) Currently Using Primary: 203.144.207.29 (39 ms) Secondary: 8.8.4.4 (71 ms) (B) US Open DNS Primary: 208.67.220.220 ...
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2answers
22 views

The CPU visible in Resource Manager are physical cores or logical processors?

The Resource Manager that pops out from Task Manager in Windows Operating Systems shows CPU consumption on the CPU tab for each of the different CPUs. I get 4 CPUs on my tab. Are they all physical ...
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0answers
40 views

OpenGL rendering affects CPU

I have a problem with an app that is slowed down significantly when an openFrameworks based app is launched. Both apps use little cpu and memory, so i don't think there's a bottleneck. I can ...
0
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1answer
33 views

very slow internet connection

I have a netgear router and the internet strength says its excellent but when i try to play online on my xbox it is very slow and only have one bar connection. And i have noticed that when it goes ...
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0answers
21 views

what is the number of operations per cycle for the cortex a57 arm processor?

Im trying to figure out how many double precision operations per cylce a cortex A57 processor can achieve, according to this manual page, there can be upto three instructions per cycle delivered ...
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2answers
137 views

Does cable length factor in on component performance? [closed]

This is completely hypothetical, and just something I've been curious about. I remember Grace Hopper on Letterman talking about correlating lengths of wire to nano seconds (a certain length of wire ...
72
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10answers
10k views

Are computers with more RAM potentially faster if not all memory is usually in use?

Let's say I have a computer with 16 GB of memory. If my computer is usually only using about 4 GB and never reaches 8 GB, is it any faster than a computer with only 8 GB of (the same type of) memory? ...
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0answers
53 views

How to improve the wifi performance of openwrt

If my computer download through my tplink router, the speed is 10Mbps, if through openwrt router, it's 5Mbps. Here is wifi information: root@localhost:/etc/config# iwconfig wlan0 wlan0 IEEE 802.11bg ...
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0answers
81 views

Sluggish Flash/HTML5 in Firefox 30.0

There are websites that have video playing back in the backround and removethebackground.com is one of those sites. This kind of effect slows browser's response almost to a crawl unless I switch to ...
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0answers
37 views

Linux: What is causing high interrupt activity for IRQ 23 (ehci_hcd)?

I run gkrellm to monitor my workstation. Total CPU usage usually runs 0-1% at idle; when there is activity, it's usually cyan-colored (user space). It was running clean this morning. A couple hours ...
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0answers
56 views

Obligatory reset after booting windows, afterwards periodical slowdowns apparent

Whenever I first boot up my PC it needs a hard reset, as it becomes unresponsive immediately after finishing loading Windows (the point where you'd expect to begin working). After this initial reboot, ...
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1answer
51 views

Inkscape very slow to start up on Windows

I've noticed lately on my Windows 7 x64 PC that Inkscape (v0.48.4) is very slow to startup. Once the window becomes visible it will display "Not responding" in the title bar for a minute or two. Once ...
0
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1answer
41 views

Understanding RAM vs CPU for basic tasks

I recently purchased a very cheap Android tablet; however, my question is actually device agnostic and my question applies to desktop PC's/laptops too. It had 1GB RAM and 1.2 GHZ processor. It ...
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0answers
15 views

Making windowed performance same as full-screen?

As you all well know, running software (let's say some demanding game) in a windowed mode drastically reduces the performance of the application (framerate), presumably because of the desktop, ...
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2answers
73 views

Any realistic advantage of 802.11ac over 802.11n for a regular home connection?

I am using a 802.11ac Asus - 802.11ac Dual-Band Gigabit Wireless router. Don't have any complains yet but does it really matter to go from a $90 802.11n router to $200 802.11ac router? In theory, max ...
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0answers
97 views

Why does my PC slow down to a crawl when VMware and ntoskrnl.exe is writing to a data drive?

My PC becomes almost unusable when writing to my data drive. The main suspect which exhibits this issue is VMware Player. The problem does not happen when I myself move files in Windows Explorer or do ...
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3answers
82 views

Available physical memory, XP

I installed a Windows XP x86 on my PC. But when I open the system information window in the System Summary tab, in the right-hand pane and at bottom the following are written: Total Physical memory ...
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1answer
35 views

Investigating linux server slow down

We have a code build server, fedora 13, which was working at medium speed for 4 users. Speed means building a code branch took 1.5 hrs max duration. It was having one quad core, 8gb ram, 200gb hdd. ...
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1answer
40 views

Why does recording a game with Fraps decrease performance?

I've run into some performance problems whilst recording some gameplay videos for Youtube. As I understand, Fraps saves the current frame pixel for pixel in a video file (in a way similar to a RAW ...
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2answers
85 views

Will overclocking my chipset increase the performance of integrated graphics?

My AMD Radeon HD 5830 recently broke (overheated because the fan stopped working), and I am currently attempting to run games on integrated graphics, on my chipset. Many games are responding slowly, ...
6
votes
1answer
5 views

Writing to subfolder is faster than writing to its parent

I use dd to measure write perfomance and observed something strange: writing to /data/emzed2 is faster than writing to /data. This is the way I measured the performance: $ dd if=/dev/zero ...
0
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2answers
78 views

CPU usage 99% constantly

My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well. The strange ...
2
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4answers
167 views

Slow Harddrive is Dragging the System

I have an HP Pro 3000 SFF running Window 8.1 Update 1 & Ubuntu 14.04 LTS. It uses an Intel G45s Chipset, a Hitachi HDS721050CLA362 500 GB harddrive, an Intel Core 2 Duo E8400 processor, and has 4 ...
1
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1answer
133 views

Why does my cursor speed slow down when my system is under intense network usage?

On some occasions of computer usage, my mouse acts very strangely. Whenever my computer is under intense network usage (i.e. watching an online video, downloading an application, patching a video ...
0
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1answer
31 views

Iperf network benchmark measures under-utilized?

I am working on two embeddded high performance network routers and I have connected them point-to-point via a 10Gbit optical fibre cable. I ran iperf benchmarks on them and when I connect through an ...
2
votes
0answers
19 views

Why do I get better performance on VMWare when I enable all cpus along with adding cpulimit?

I'm curious but at the same time also would like to share my findings of the increased gaming performance in VMWare by enabling all virtual cpus and limiting the VMWare process with cpulimit ...
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0answers
26 views

Windows will not open processes

I recently I come upon an unexplainable issue concerning my Windows 7 partition. When I woke up Thursday morning and logged into Windows, I discovered that it was acting really slow. It didn't take ...
3
votes
1answer
98 views

Is there a way to identify the busy (CPU-consuming) tab in Firefox?

Sometimes there's a nasty, guilty, CPU-hogging tab in Firefox that's maxing one of my CPU cores and making the whole browser sluggish. I'd like to find it and close it. Sometimes I get lucky, but ...
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1answer
65 views

Why does wmic tells my memory speed is 1333MHz, but Speccy says 665MHz?

I've checked my computer specs, and I saw I had memory in 1333MHz speed. I've checked it in wmic (see pic) and it's true. B ut i've checked it in Speccy (see pic) and it shows 665MHz. I've checked ...
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2answers
57 views

Does Windows still copy each file directly to disk, unlike Unix?

Unix was originally designed to perform file system operations in memory, and to update the disk blocks only every 30 seconds during sync. This resulted in a much faster user experience than MSDOS ...
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2answers
35 views

Is software like tune up utilities essential?

Is software like tune up utilities necessary? Can't we perform the tasks using some other free ware tools and built in windows tools?
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1answer
59 views

i7 (first-gen) running memory on 1066Mhz vs 1600Mhz - any performance loss?

I tried to read about this, like what is the actual difference, but I could not find any benchmarks or helpful posts. Most of them are simple placebo effects, like "oh my god the 1600mhz module made ...
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0answers
103 views

Slow File Transfer over Gigabit Network

There are a few computers connected to a computer (Windows 7 x64) via a Gigbait network in order to transfer file, however lately the transfer of files has been really slow (11Mb/s) I have already ...