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

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4answers
11k 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. ...
8
votes
4answers
8k 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 ...
8
votes
5answers
4k views

Is ext4 more expensive than ntfs?

I have just converted an NTFS partition to ext4, however the total space seems reduced from 421G to 415G. Where did the 6G go? And, the reserved space is grown to 199M in ext4, much larger compared to ...
8
votes
3answers
15k views

What's the typical performance of Windows File Sharing (SMB) on a gigabit ethernet network?

I've recently set up Windows file sharing over a gigabit ethernet network (I'm not using jumbo frames) with a Samba server and a Windows Vista client. I've done a few file copies, but the maximum ...
8
votes
2answers
1k views

Virtual Machine optimizers [closed]

I have read a discussion about musthave Windows software. User esabine addend a link to Scott Hanselman's tools list. One of the tools Scott was writing about was an optimizer tool for VM’s. - ...
8
votes
3answers
288 views

How to get the most out of laptop battery life of a Windows PC?

I'm a big fan of portability and battery life. I want to take the most out of a single recharge. Any tips to accomplish that? Things on top of my mind: Voltage reduction (with RMClock, any better ...
8
votes
5answers
8k 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 ...
8
votes
3answers
769 views

Compiling the Linux kernel

Just for the learning experience, I have recompiled the Linux kernel with different options, installed and booted from it. It was both instructive and straightforward. However, I was overwhelmed by ...
8
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3answers
5k 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 ...
8
votes
3answers
19k 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 ...
8
votes
3answers
9k views

How do I find out which processes are causing the most disk activity?

I am hoping to find a way to do more performance monitoring--specifically, I hope that monitoring disk activity on a per-process basis will help me decide which programs are causing the most trouble ...
8
votes
3answers
2k views

Visual Studio Performance problems when writing XAML

I've dealt with Visual Studio performing terrible for too long now. Now I'm past the point of being emotionally broken and need help. I can't figure out how to fix the issue of the Visual Studio ...
8
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 ...
8
votes
5answers
4k views

How can I reduce the size of Windows 7, and its CPU and memory usage?

My Windows 7 setup uses around 16GB while Windows XP only needs around 4GB hard disk space. Seems weird. I use Windows only for gaming so I don't need a lot of stuff they have to offer. What is the ...
8
votes
3answers
10k views

How can I find out what is using the hard disk? [duplicate]

Possible Duplicates: hard drive activity by program? What is causing hard drive grinding? Once or twice a day my computer starts writing significantly hard to the hard drive, the HD led ...
8
votes
1answer
11k 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).
8
votes
2answers
185 views

Why has 'cat' this strange time behaviour?

I'm using cat to pipe different files into one big file. The number of different files varies, from two files up to ten, but the total size of all files is always the same (a couple of GB). My ...
8
votes
1answer
1k views

How to measure actual USB3 port speed?

Not all USB3 ports are created equal. I have a friend who develops embedded hardware that interfaces with USB chipsets. He told me that most USB chipsets that are slightly faster than USB2 (480 ...
8
votes
1answer
4k 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 ...
8
votes
3answers
5k views

Google Chrome briefly hangs before rendering a new tab

Whenever I want to switch to a tab other than the one that is being rendered, Chrome hangs for about 2 seconds before rendering the new tab. This occurs whenever a new tab has to be showed, such as ...
8
votes
6answers
2k views

Utility to optimally distribute files onto multiple DVDs?

I have a bunch of media files which I want to record to DVD, but since each DVD only fits 4.5GB, I have to find the optimal way to organize the files to use the minimum number of DVDs (otherwise the ...
8
votes
2answers
7k 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 @ ...
8
votes
2answers
4k 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 ...
8
votes
1answer
2k views

Performance of Multiple RAM Sticks Compared to Single Sticks

It's no secret that using two physical drives gives better performance than two partitions on the same physical drive; because there are two devices, they each have their own platters, head, caches, ...
8
votes
0answers
293 views

How do I evaluate an SSD caching solution for home desktop use? [closed]

I've got a 30GB SSD that I would love to start using as a cache for my larger HDDs. I primarily want to improve apparent performance for general desktop use. I do the occasional massive DB migration ...
8
votes
7answers
34k views

TiWorker.exe - Very High CPU Usage

I have a laptop running Windows 8. Although it originally ran well, it started having very bad performance issues. I decided to perform some research into the topic. Opening up Task Manager, I ...
7
votes
6answers
858 views

Default Windows 7 Install: What to change to make it faster?

I remember there were guides for Windows XP on all of the unnecessary services and things that you could turn off in a default install to make the system a bit more 'snappy'. Is there such a guide ...
7
votes
5answers
4k views

MacBook Pro for Windows development via virtualization. Performance?

I am a Windows/Web developer by profession and I have been considering a MacBook Pro as a replacement for my current development machine. I am impressed by the build quality, the uni-body construction ...
7
votes
6answers
12k views

RAM speed: How does it impact performance?

How important is RAM speed for computationally expensive tasks like gaming, video encoding, video editing, graphics software (Photoshop/Sketchup)?
7
votes
5answers
11k views

Why does Firefox cause high-CPU-usage “spikes” every few seconds?

When I start Firefox, I have no problems for a while, but after a couple of days, CPU spikes start to occur. During a spike, Firefox freezes and then stops. Spikes occur every seven to ten seconds, ...
7
votes
3answers
932 views

Why are apps so slow initially when switch to them, even though I have free RAM?

On my Windows 7 (64-bit) PC, when I have a few resource hungry programs going, and half a dozen others, when I switch to an app that I haven't used for a while, it takes a long time to respond and I ...
7
votes
2answers
4k views

How to make high performance cluster out of 2 laptops I have at home [duplicate]

Possible Duplicate: Is it possible to combine processing power of 2 computers? Hi, I have 2 laptops at home. Could someone please suggest some free cluster softwares using which I can make ...
7
votes
8answers
32k 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 ...
7
votes
3answers
9k 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 ...
7
votes
3answers
1k 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
3answers
4k 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 ...
7
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 ...
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
2answers
454 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
1answer
1k 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 ...
7
votes
6answers
8k 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
1answer
13k views

Does a USB hub affect performance?

I have two devices I want maximum throughput and latency with. (Midi drums and midi keyboard for example) Would connecting both to the same USB port via a hub effectively limit the maximum data ...
7
votes
6answers
29k views

Windows 7 kills VMWare performance by disk caching?

We're running Windows 7 Enterprise 64-bit SP1 on Dell Precision T3500's (Xeon E5630 @ 2.53GHz, 4GB of RAM). On top of this is VMWare Workstation 7.1.4, up to date. Running in a VM is Windows XP ...
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
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
319 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
307 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
179 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 ...