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

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7
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3answers
36k views

How mSSD Hard Drive Acceleration Cache improves performance?

I am looking forward to buy a laptop and while configuring online from HP's site for model dv6tqe ...
7
votes
3answers
12k views

How to correctly partition usb flash drive and which filesystem to choose considering wear leveling?

Two problems. First one: how to partition the flash drive? I shouldn't need to do this, but I'm no longer sure if my partition is properly aligned since I was forced to delete and create a new ...
7
votes
2answers
2k views

Why does Chrome group my tabs in processes and how can I stop it?

I noticed that in Chrome, it groups all the tabs into one renderer process, at least for me. This is a problem because that makes Chrome really slow from having 150k of RAM to sort through. Is there ...
7
votes
1answer
321 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 ...
7
votes
2answers
322 views

A USB keyboard in a Microserver is causing the machine to become very unresponsive

This video explains it best - Youtube Link I have purchased a number of Microservers and have finally got around to setting the first one up. It doesn't have a PS2 port, but, has loads of USB ports. ...
7
votes
2answers
181 views

CPU-adaptive compression

Let assume I need to send some data from one computer to another, over a pretty fast network... for example standard 100Mbit connection (~10MB/s). My disk drives are standard HDD, so their speed is ...
7
votes
2answers
2k views

Performance issues when using SSD for a developer notebook (WAMP/LAMP stack)?

I'm a web application developer using my notebook as a standalone development environment (WAMP stack). I just switched from a Core2-duo Vista 32 bit notebook with 2Gb RAM and SATA HDD, to an i5-2520M ...
7
votes
3answers
6k views

When should I activate the “launch folder windows in a separate process” option?

In folder options -> view, there's an option that's off by default called "Launch folder windows in a separate process". I'm on windows-7, but I know this capability has existed since at least windows ...
7
votes
1answer
5k views

The meaning of thermal throttle counters and package power limit notifications in Linux

Whenever I do some performance testing on my Linux-installed MacBook Pro, I often see the following messages in dmesg: Aug 8 09:29:31 infinity kernel: [79791.789404] CPU1: Package power limit ...
7
votes
3answers
14k views

Windows 7 System process reading/writing like crazy

I have a problem that my windows 7 computer sometimes starts accessing the disk like crazy for maybe 10 minutes at a time. The process in question is the "system" process. I have disabled superfetch ...
7
votes
2answers
3k views

How can I find out what's the bottleneck slowing down a particular process / the entire system?

Given a specific running process, is there a way to find out what hardware element is currently the bottleneck for its operation? In other words, is its current computation CPU-bound, GPU-bound, ...
6
votes
1answer
759 views

Why don't computers work at the speed of light? [closed]

Pretty simple question. Computers are made using electronics which uses electricity which I presume travels at the speed of light. If all the components are connected at this speed, why does my ...
6
votes
4answers
3k views

Poor Flash performance on Mac OS X?

I've been using Mac OS for almost 3 years now. What I have noticed couple of months ago, and what annoys me more and more over time, is that any Adobe Flash applications, content or adverts on website ...
6
votes
4answers
6k views

Easiest way to time a command line tool

What is the easiest/quickest way to time a command line tool? It doesn't have to be super accurate (+/- seconds is okay) since I expect this to take minutes or even 1 hour+. And writing a batch file ...
6
votes
9answers
5k views

Snow Leopard sluggish after upgrade from Leopard

I recently upgraded from Leopard to Snow Leopard on my white Macbook (mid-2007) and immediately noticed a bunch of performance issues: Finder is a lot slower at displaying the Applications folder. ...
6
votes
7answers
158 views

Does Seven suffer of a performance decrease compared to Windows Vista?

I have to format and reinstall Windows on an old laptop (bought around 3 years ago) because of usual degradation of performance of Microsoft operating systems.. The computer had Windows Vista and I ...
6
votes
5answers
18k views

Photoshop CS5 insane slow on Windows 7 x64 Ultimate

I've bought a powerful machine, Intel I7 720Q with 8 GB RAM and 7200 RPM HDD and Radeon 5870 with 1GB VRAM, and after installing the new Adobe Master collection CS5 I found out, that both Photoshop ...
6
votes
9answers
4k views

SSD for Visual studio : Intel X25-m G2 or OCZ Vertex

looking for laptop upgrade, and thinking about SSD drive. Laptop would be Dell Studio XPS with T9400 as i can get one for a very good price. So i was thinking about replacing the built in 500 GB hdd ...
6
votes
3answers
4k views

Practical RAID Performance?

I've always thought the following to be a general rule of thumb for RAID: RAID 0: Best performance for READ and WRITE from stripping, greatest risk RAID 1: Redundant, decent for READ (I believe it ...
6
votes
1answer
2k views

Why are there many processes listed under the same title in htop?

Can anyone explain to me why there are sometimes 10 or 15 processes with the same title and "stats" listed in htop? I'm guessing there are multiple threads running - but that many of them obviously ...
6
votes
7answers
3k views

Running OS off a dedicated Hard Drive

What do fellow users feel about the strategy of having a dedicated OS hard drive for a PC? Basically all the Windows and Program Files are on one, high performance, disk whereas your data is stored on ...
6
votes
5answers
64k views

Windows 7 running slowly with low CPU usage and memory

I have a relatively new (under 2 yrs old) Windows 7 machine. It has 9GB of RAM, and an i7 core CPU (930 @ 2.8GHz w/ 8 CPUs). After about 8 months since a clean install, I noticed my computer was ...
6
votes
3answers
842 views

Does the amount of available free disk space in Windows (XP only?) impact performance?

I remember reading that when the available free disk space falls below 10% of the total disk space on the computer, performance is degraded. If true, can someone explain this in more depth than what ...
6
votes
2answers
2k views

Install 64-bit Ubuntu or 32-bit?

I'll be receiving a new notebook in a few days and was planning on running Ubuntu on it as it's compatible and the notebook has no OS pre-installed. The specifications are: Core 2 Duo, T6600, 4 GB ...
6
votes
2answers
1k views

Why is building a solution slower on a Core i7 than on a Core i3 processor?

Background: We have a C# solution with 49 projects and it uses VS2005 SP1 (didn't upgrade to higher version due to old version of Syncfusion 4.x lib). The project uses Ant with ISharpCode zip library ...
6
votes
2answers
7k views

Windows, why your 8 GB of RAM feel like a few MB?

I'm on Windows 7 x64 with 4-core Intel i7 and 8 GB of RAM, but lately it feels like my computer's "RAM" is located solely on the hard drive. Here is what the task manager shows: The total amount ...
6
votes
3answers
909 views

Which partitions in a windows system should be placed on a SSD for optimum gaming performance?

I'm going to build my next gaming system. I do not care for the load time of Windows 7. It could take 15 mins, I'd just do something else meanwhile. So I'm thinking I put the SSD disc only for my ...
6
votes
13answers
102k views

What are possible causes of keyboard lag on my desktop machine?

I am running Windows 7 and began experiencing keyboard lag in most applications, and it seems to be getting worse. Certain websites are the worst - on some, I can type a sentence, take my hands off ...
6
votes
2answers
187 views

Are virtual machines performant enough to be a primary workstation?

I have a MacBook Pro through my employer, but I prefer to spent most of my day in Linux. Will running Linux in a virtual machine (e.g. VirtualBox) in full-screen mode be enough slower than running it ...
6
votes
2answers
127 views

trying to get antivirus policy changed

I am a radiologist who spends all day taxing my computer with thousands of medical images and heavy duty image processing. Unfortunately, my hospital, and many like it, apply the same antivirus policy ...
6
votes
3answers
1k views

Recommendations for hard drive performance boost

I'm going to be building a new system soon and I'm willing to spend a few more dollars to improve my hard drive performance. This will be a general use system so I just want to see HD intensive tasks ...
6
votes
1answer
14k views

How to increase VLC RAM buffer for offline files?

I would like to configure VLC player to preload a significant portion (like a hundred megabytes or so) of a video file from the hard disk to RAM before playing it. Is this possible?
6
votes
3answers
5k views

Alternative to Mac OS X Activity Monitor?

I use "Activity Monitor" in a background window to keep an eye on the memory use of each programme and resource use. I am frustrated that the network/CPU/disk activity graphs are tiny and can only ...
6
votes
1answer
4k views

Troubleshooting slow SSD

I have a Mushkin Enhanced Chronos 120GB SSD (http://www.mushkin.com/Digital-Storage/SSDs/MKNSSDCR120GB.aspx). Its performance is rated as: Capacity: 120GB Read Speed: up to 550MB/sec ...
6
votes
3answers
2k views

Is it worth to buy an external USB SSD drive for my laptop to increase performance?

I'm a programmer, and I use Eclipse for Java development. Recently I've installed an internal (SATA) SSD drive on my home machine, transferred Eclipse installation and project to it and noticed a ...
6
votes
3answers
5k views

What is a normal file copy speed for SSD?

I am copying a folder (320 items, 1.9GB) on an SSD to a different location on the same SSD and getting a transfer rate of 5MB/s. Is this to be expected? Simultaneous reading and writing to the same ...
6
votes
3answers
2k views

How to measure performance gain with defragmentation?

I believe I understand the basic concepts of fragmentation of data on hard-drives, and the concept of defragmentation to counter the effects of this. What I don't really understand is how one actually ...
6
votes
1answer
223 views

No performance increase on I/O intensive operation after symlink to ramdisk

We have a system that transforms a set of several thousand multi-MB files. After every step in the transform, it writes the intermediate file to disk. The concept is similar to a scratch disk. We ...
6
votes
2answers
610 views

Why is the grep/-r/--include combination slower than the find/-exec/grep combination?

From my understanding, the two following commands roughly accomplish the same thing: Command 1: find -name "filename.xml" -exec grep someString {} \; Command 2: grep -r --include=filename.xml ...
6
votes
2answers
3k views

Is the L3 cache shared by all cores for a Sandy-Bridge E Xeon CPU?

In a related question (http://superuser.com/questions/412988/impact-of-the-l3-cache-on-performance-worth-a-dual-processor-system) I asked about the benefit of a dual-CPU system in terms of doubling ...
6
votes
2answers
333 views

Are usb pendrives/sticks random access?

Do USB pendrives/sticks have random access (i.e. accessing one block will take equal amount of time, regardless of the previous block read) characteristic?
6
votes
5answers
15k views

Do shortcuts and folders on the desktop really slow the PC down? [closed]

Normally whenever I repair a PC I tell the customer that they should limit the amount shortcuts or folders or files that they place on the desktop to speed up performance (it also really annoys me ...
6
votes
8answers
11k views

Windows 7 Loading Very Slow

I've had a problem that only started to occur yesterday. When I boot into Windows 7 and log on to my user account, the computer gets very laggy and slow for at least 5 minutes. Icons take ages to ...
6
votes
5answers
2k views

Why is Firefox 3.0 so slow in Linux?

I'm running Firefox 3.0.14 32-bit on Ubuntu 9.10 32-bit. It's much slower than in Windows XP on the same machine. Does anyone know why? Also, what's a possible way to improve the performance? ...
6
votes
5answers
2k views

Firefox still working in memory after being closed

I'm about ready to give up on Firefox, because whenever I shut it down, it's still working in the background, and if I leave it up it, then over time it works more and more. My hard drive is really ...
6
votes
1answer
473 views

Does Having Computer Running Idle Impact Solid-State Drive's Life Expectancy?

As long as computer is operating, OS constantly performs small writes to storage medium. This is what I have not paid attention to earlier until I saw total writes in CrystalDiskInfo, Intel Toolbox ...
6
votes
3answers
379 views

Does Windows 7 on a Solid State Drive suffer noticable “Windows Rot”? [closed]

"Windows Rot", defined as the build up of old programs distributing shared files everywhere, having several unnecessary programs running at start up and cluttering the registry can significantly slow ...
6
votes
1answer
592 views

Is a larger hard drive with the same cache, rpm, and bus type faster?

I recently heard that, all else being equal, larger hard are faster than smaller. It has to do with more bits passing under the read head as the drive spins - since a large drive packs the bits more ...
6
votes
1answer
7 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 ...
6
votes
2answers
14k views

System and Interrupts causing high CPU

Under Process Explorer, I noticed that System -- and occasionally Interrupts -- are taking between 5% and 20% CPU constantly, for hours on end. This is resulting in weird video playback problems. ...