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

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7
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3answers
669 views

Profiling your windows operating system

I am boggled when I click on an application in windows and have to wait 10 seconds for it to respond. I wonder "you can run 16 billion instructions a second, what are you doing that keeps you from ...
7
votes
4answers
8k views

Why is my browser using so much memory?

I've recently had problems with Firefox running very slowly when I have many tabs open; say 20 tabs. My whole system would slow down. I decided to give Google Chrome a try, and it started out fine. ...
7
votes
7answers
3k views

Are SSDs worthwhile for software development? [closed]

I have a MacBook with 8GB of RAM and a 500GB 7200rpm hard drive. I write software for a living. I am contemplating getting an SSD Drive, but I am unsure about the performance. Do SSD drives really ...
7
votes
3answers
4k views

What's the difference between 8 MB and 16 MB Cache on a hard drive?

I'm looking to replace a dead hard drive in an older notebook. The current (bad) hard drive is a Toshiba 60 GB 5400 RPM HDD with 16 MB cache. It's very difficult to find replacement ATA-100 notebook ...
7
votes
6answers
6k views

Looking for a fast CLI Linux distro

I'm looking for a fast Linux distro to put on a USB key. The goal is to be able to boot in as few seconds as possible, with just enough to mount a hard drive and do some basic operations in there ...
7
votes
3answers
14k views

How can I speed up data transfer between local computers on a WiFi network?

I have a router with ADSL Pentagram Cerberus 6331-42. Is it normal to have transfer speeds between two computers of max 1MB/s (not 1 Mbit)? How can I set my router up to make it faster at transferring ...
7
votes
4answers
5k views

Quickest way to merge snapshots in VirtualBox?

I have vdi with quite a number of snapshots taken from it - say, 50 or 70 snapshots. I want to have one plain vdi with a current state. These snapshots take way too much disk space and are not needed ...
7
votes
2answers
403 views

Strange performance of SSD

My SSD (on Windows XP) is working well, however, I get the following strange results from Crystal Mark 2004R3: 236 MB/s for sequential read 59 MB/s for sequential write 168 MB/s for random read ...
7
votes
4answers
2k views

To what extent is size a factor in SSD performance?

To what extent is the size of an SSD a factor in its performance? In my mind, correct me if I'm wrong, a bigger SSD should be, everything else being equal, faster than a smaller one. A bigger SSD ...
7
votes
3answers
34k 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
2answers
174 views

Strange time behaviour of 'cat'

I'm using cat to pipe different files into one big file. The number of different files varies, from 2 files up to 10, but the total size of all files is always the same (a couple of GB). My problem: ...
7
votes
1answer
10k views

What is the performance cost to running Bitlocker?

BitLocker encrypts the entire hard drive. I run Visual Studio and build projects much of my day. How much will BitLocker slow me down? (dual core laptop with 3GB of RAM).
7
votes
3answers
9k 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
2answers
2k views

netem for Mac OS X to emulate network latency and dropped packets

I'm looking for an open source/free network emulator tool that I could use on Mac OS X, to simulate a slow network connection, limited bandwidth and other network characteristics such as dropped ...
7
votes
1answer
3k views

Linux: CPU core shutdown instead of sleep state

In Linux you can shut down CPU cores (or physical CPU's) with echo 0 > /sys/devices/system/cpu/cpu1/online Assuming that the hardware fully turn off the CPU and cuts power to it would it not be better ...
7
votes
2answers
168 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
2answers
3k 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 ...
7
votes
2answers
6k views

How to decrease the CPU usage when running Virtual Box?

I am facing an issue with 100% CPU usage under my system when running VirtualBox. Here are some further details: My System Information: CPU 1 name: Intel(R) Pentium(R) Dual CPU T2310 @ ...
6
votes
1answer
658 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
5k 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
153 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
6answers
7k views

New I7 CPU has very low Windows Experience Index

Two new laptops that contain an INTEL CORE I7-2920XM CPU have a Windows Experience Index score of 3.8. This laptop (a brand new Dell Precision 4600) responds very slow in various Office programs. ...
6
votes
5answers
16k 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
9answers
3k views

Firefox: How to speed up the Smart Location Bar (AwesomeBar)?

The Firefox AwesomeBar is indeed awesome. But, lately I see that it has become slow. On entering some characters it even freezes for a few seconds (freezing the entire browser). Why does it slow ...
6
votes
3answers
3k 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
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
3answers
694 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
793 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
3answers
884 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
8answers
27k views

Cleaning up temp files in Mac OS X

My 4 months old Mac partition volume is losing space slowly and gradually. I am pretty sure there are a lot of orphaned temporary files laying around in the volume. I know where to find the obsoleted ...
6
votes
2answers
12k views

Running a VM off a USB 2.0 Flash Drive - Mac/Parallels/XP

I use a MacBook Air as my primary machine, and the 128GB SSD means space is precious. To save about 10 GB, I've been running Parallels with a Windows XP VM off an external USB hard drive, which ...
6
votes
2answers
169 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
2k views

Is it worth reinstalling to enable AHCI on my SSD in order to improve compile performance under Visual Studio?

I am compiling to an SSD connected through SATA using IDE emulation on Windows 7. Unfortunately, I forgot to enable AHCI when I installed, and though there are ways of performing surgery on Windows ...
6
votes
5answers
4k views

Over gigabit connection, Teracopy does 31MB/s, but Windows 8 does it at ~109MB per second?

I got my brain-melting first taste of Gigabit networking today, between my 2011 MacMini and Windows 8 Pro desktop connected via Cat.5e to Linksys WRT320N(sporting dd-WRT). After making sure that the ...
6
votes
3answers
3k views

Debugging Linux I/O latency

I'm having some I/O problems on a couple of Linux systems that I administer. They manifest in that processes often block for up to several seconds in such simple syscalls as open(), unlink() or ...
6
votes
4answers
6k views

Why do file copy operations in Linux get slower over time?

I have 12 ~200 MB files. Copying one of them to another drive takes 20 seconds. When I try to copy all of them at once, it first says it's going to take 5 minutes, then it keeps slowing down into the ...
6
votes
3answers
3k 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
1answer
919 views

How to move a file from one location to another on the disk?

I want to move a specific file (for example a binary .exe) that occupies a specific low offset (physical position) on my HDD to a lower offset (external edge of my HDD). From what I know I can't do it ...
6
votes
3answers
4k 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
2answers
516 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
271 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
8answers
10k 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 ...