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

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1answer
219 views

Difference between Instruction, operations and micro-operation (uop) [closed]

I am trying to understand the intricate terms related to performance of processors. Computer performance is measured in FLOPS, which is short for FLOPs per Second. FLOPs itself stands for ...
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2answers
52 views

Is it bad for a CPU to be running at a high speed for extended periods of time?

I have an Intel Core i7-4770S (3.10 GHz) that can go up to 3.9 GHz in turbo mode. Windows Task Manager can report it going up to about 3.5 GHz when playing certain games and probably goes higher every ...
0
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1answer
47 views

I can copy a file from my NAS but not watch it

I have a cheap embedded linux NAS (a Seagate Central.) The device is certainly underpowered, but it's not entirely useless. One thing that bugs me is that I can reliably copy a 300MB AVI file to my ...
0
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0answers
112 views

Graphics stuttering in 3D Games

Every time I play a game, I experience random stuttering of video and the FPS counter very briefly goes down to 0. This stuttering can be seen in this YouTube video, with the most obvious stuttering ...
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0answers
60 views

Windows internet sharing uses 50% of my CPU

I discovered that svhost.exe process is using almost 50% of my CPU time when computer was almost idle - I was downloading big file with USB 3G modem with 80kB/s speed. I have relatively fast CPU ...
0
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2answers
61 views

fastest RAM configuration [closed]

I am planning to buy a workstation for doing heavy image processing parallel computation (for 3-dimensional electron microscopy) under linux. It will have 64 cores (4 AMD opterons of 16 cores each). ...
0
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1answer
141 views

Virtualbox Mac OSX host - Ubuntu guest is slow and laggy

I did some research already as to why my Ubuntu guest is slow on my (quite powerful) MBP but no success. Is there something I am missing? A setting? A configuration? FYI I am usin g: ICH9 chipset ...
1
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1answer
186 views

SSD Performance showing as 'bad'

Today I stripped down and rebuilt my PC (to get rid of surplus cabling, and to give it a clean since it was pretty dusty in there), and everything is running fine. Well, except my SSD (apparently). ...
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0answers
57 views

Linux, vim and ssh: why is vsplit slow?

As soon as I have more than one file visible with a vertical split (= :vsplit) the moves and screen refresh become sluggy. I've noticed that on many different Linux systems (old and my very recent ...
-1
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2answers
65 views

Why is my computer slower now than it was when I bought it after a clean installation? [closed]

I've just reformatted my home PC. It's an i7-920, 16GB RAM machine (so it was pretty good back in the day). I've installed a clean installation of Windows 7 and I'm wondering why the PC is much ...
0
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0answers
114 views

Computer became slow recently

System Specs: Windows 8.1 64-bit Intel Core i7-4700MQ CPU @ 2.40GHz, 8.0GB RAM, Intel HD Graphics 4600 / NVIDIA Geforce 750M GT Computer has been recently slow. This includes startup ...
2
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2answers
404 views

What are the differences between “scientific GPUs” and “gaming GPUs”?

I am currently working with neural nets and I recently made my code much faster by configuring a framework correctly to make use of a GPU. The GPU that is used is a Tesla C2075, which is part of the ...
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0answers
15 views

My System speed seems slower than the components would predict

I run an Intel 4770k CPU overclocked to 4.6 GHz, 32 GB G-Skills DDR RAM, primary boot drive Samsung 840 SSD, 10 TB auxiliary drives, 3 GB Radeon video, 1000 W PSU, Zalman GS 1200 case with Windows 8 ...
0
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0answers
36 views

How can I improve the performance of my audio software?

I am running OtsAV on Windows XP. The way it works is by buffering a small amount of data from the hard drive just before it needs to play it. It used to give flawless sound no matter what else was ...
0
votes
1answer
37 views

SSD Setup OS/Programs/Documents

I am trying to configure a new computer using SSD's. Am leaning toward the following configuration: 1) SSD of about 120GB solely for OS 2) SSD of about 120GB solely for programs I would use (MS ...
1
vote
1answer
42 views

“Disk” always at maximum usage

I recently opened up my laptop to fix a faulty power connector. Since then I have noticed my disk usage (not sure what it actually corresponds to) has been very high, as in the screenshot below: (Note ...
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0answers
20 views

Low Memory Performance

I am currently benchmarking some of my code to see where the bottleneck is. My memory is DDR3 1066MHz DualChannel Mode This should result in 17GB/s peak memory performance. With my code I am ...
1
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0answers
47 views

Slow Windows Application Startup

I have Windows 8 Pro/i5 3320M laptop with 8GB memory. Java based applications such as Eclipse, Phpstorm takes about 15-30 mins to load. (i assume issue is with java apps, others work fine). I tried ...
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0answers
2k views

ext4 vs btrfs performance on SSD array

I am observing something that I cannot explain. I am trying to come up with a good filesystem configuration using HP P420i controller and SSDs. Out of curiosity I have tried BTRFS (still unstable so I ...
0
votes
1answer
54 views

Asus N56VB-S4016H disk response time

We recently bought 3 Asus N56VB-S4016H laptops, and although the specs are great for the price it costs, we are experiencing similar issues on all 3 of the devices. After startup, a cold boot or from ...
0
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2answers
49 views

Does writing to SSD influence SSD Read spead?

I use my SSD to read and write at the same time, and I found that writing influences read performance quite a lot. Example: Without write, my read may be X MB/s, but with write, my read became 0.5X ...
-1
votes
2answers
147 views

How much faster is SSD compared to regular hard drive?

http://www.seagate.com/internal-hard-drives/solid-state-hybrid/desktop-solid-state-hybrid-drive/ Some says that using hybrid drive is 4 times faster. Some says it depend on data read. SSD is only ...
0
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0answers
50 views

why is my sort slower with more ram?

System specs below. I recently purchased 2X4 RAM: Corsair XMS3 8 GB (2 x 4GB) 1333 MHz PC3-10666 240-Pin DDR3 Memory Kit CMX8GX3M2A1333C9 I already had 2X2 in there for a total of 12GB: Corsair ...
1
vote
0answers
23 views

Why does top and Google Compute Engine give me two totally seperate cpu % values?

So to preface this, I haven't done much in Linux since a decade ago when I was in college, so I may just be doing something stupid. However, for this project I am working on I'm performing a load ...
0
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0answers
49 views

What is fastest way to backup a disk image over LAN?

Sometimes I boot sysrescd or a similar live linux on a PC to backup the hardrive over local network to my server. I noticed many times, that the transfer speed is not optimal (slower than HDD and ...
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0answers
34 views

Rail's FileStore with Linux Disk Caching or RAMdisk?

I have a Ruby on Rails application that stores it's catched files on the filesystem (Rails file-system cache). I was thinking about changing to memcached Store, but a short test shows it isn't a big ...
-1
votes
1answer
55 views

Installation Optimisation With Limited SSD Space

Tomorrow, I need to rebuild a windows 7 machine due to various issues. It currently has a 500GB HDD as the primary drive, with a 120GB SSD. As a developer, I need to keep as much space free as I can ...
-2
votes
2answers
63 views

Why does a c++ code run significantly longer on one computer than another? [closed]

The code is exactly the same -- I copied it from one computer to another. The code is compiled with g++-4 (4.9.1) obtained from fink on OSX on both machines, and is not run in parallel. Compiler ...
1
vote
1answer
12 views

Why do desktop OSes have a high response time when resumed from sleep/hibernation mode?

Why do desktop OSes such as Windows have a high response time when resumed from sleep or hibernation mode? Intuitively, it should take less time to respond. But what is messed up internally that ...
0
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0answers
189 views

Automatic Maintenance Significantly Slows Down Computer

Problem I've found on several occasions that I've gone to use my computer only to find that it's practically unusable; just about everything runs extremely slowly. Symptoms The action center flag ...
0
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0answers
85 views

Will IIS8.5 do a better job for WebDAV data sharing than Apache in terms of performance and file locking?

Right now I am using Synology's built-in WebDAV function, which I think is based on Apache server. The issue i am having are basically slow transferring speed and missing file locking ability. The ...
0
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2answers
45 views

Need help diagnosing my machine

I have something that just slows my computer to a crawl sometimes. Not running anything big. Yesterday all I had running (besides background apps) were Firefox & Windows Explorer and could barely ...
0
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1answer
57 views

How can I identify what is slowing down my mac when nothing is eating up CPU?

Sometimes I'll have characters appearing slowly on screen, an unwelcome beach ball or pages like google images will freeze while scrolling. When this happens often all seems calm in activity monitor, ...
0
votes
3answers
1k views

Lenovo Y50 laptop does not perform well when Discharging [closed]

I just bought this laptop (Lenovo Ideapad Y50). I'm playing games such as Battlefield 4 (upto date DLC) and WatchDogs. Even though I set battery manger to High Performance mode game doesnt works well ...
0
votes
1answer
15 views

Laptop hot, CPU intensice

Laptop has been at around 70 degrees C for a while while idle compared to regular of around 50 (60 under load). Load average is 3 compared to past of 1.2 to 1.5. cat /proc/cpuinfo |grep MHz returns ...
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0answers
32 views

Excel consuming absurd amount of memmory

I have a excel file consuming a huge amount of memmory, something ~500mb. The file contains only one sheet, no images or scripts and its size is only 719kb. I have checked all suggested solutions ...
0
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2answers
64 views

Computer took much longer than normal to boot, and now windows open and close slow

I've got a Sager laptop, a GeForce GTX 680M, an i7, 32GB of RAM, and I'm running Windows 7. My computer recently began to make that sound Windows makes when you plug in or unplug something (The da duh ...
1
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0answers
26 views

Some applications slow on network (win 8.1), where to start?

I recently got a new computer with windows 8.1. I identified at least two applications are very slow when the are using the network. This is the MS dynamics AX client (very slow all the time) and ...
0
votes
1answer
164 views

poor write performance with RAID 5 array

I have an Intel RS2WC080 RAID controller card connected to an array of 8 WD Black 4TB SATA3 drives, in a RAID5 configuration. While the read speed is ~750MB/s the write speed hovers around 45MB/s. I ...
0
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0answers
119 views

Xcode keeps showing the beachball when I select something

When I select something in the xcode editor and then try to select some other text, the spinning beachball comes up and i have to wait for a couple of seconds before i can continue working. I have the ...
0
votes
1answer
249 views

How to identify hardware performance bottleneck in laptop? [closed]

Is there any tool that helps to determine the weakest link of my current laptop hardware specification? Any online guide to help me choose nice balanced configuration for the new laptop? I need to ...
0
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0answers
48 views

Windows 8 notebook, 100% disk activity

I don't know what is happening, i have spikes in which the disk activiy goes up to 100% for 10 secs, once every minute or so. During those events I cannot see any process writing or reading from disk ...
0
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0answers
103 views

GIMP slows down my Ubuntu 14.04 over time

I have some problems with my GIMP recently. When I start GIMP it runs perfectly fine, but over time, say about 15 minutes, it's starting to slow down my Ubuntu (14.04). After checking my system ...
-2
votes
1answer
69 views

Choosing PC components for high performance calculations [closed]

What is the best practice to choose the components of the PC targeted at some "heavy" calculations? In particular, one might expect some compilers to be optimized for some CPUs better than anothers; ...
-1
votes
1answer
61 views

How do I optimize eSATA performance in Linux?

I experience very slow eSATA performance. Around 5 mb/s on a disk that easily handles 150-200 mb/s. Do I need to enable some setting or module in order to speed it up? The disk is a 4 TB disk and the ...
0
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0answers
9 views

mksquashfs performance depends on CPU load?

I'm trying to realize is mksquashfs performance depends on CPU load? While I'm compress the same data, i'm always get different by md5sum archives. Is this persist in compression size of archive? ...
0
votes
1answer
39 views

Cores and threads - Performance

I wonder if a 4 core/8 thread cpu will perform better than a 4 core/4 thread cpu. If the answer is yes; How much better will a 4/8 perform? EDIT: What if its for running 4 single threaded apps? And ...
0
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0answers
472 views

Switching between integrated and discrete graphics on alienware 14?

I recently received a new alienware 14 in the mail and was having some issues switching between integrated and discrete graphics. When I used the inbuilt benchmark tests in Just Cause 2 i pulled in a ...
0
votes
1answer
51 views

Picking the right ram [duplicate]

I informed myself of picking the right ram, but there are still questions. I am currently running a AMD Phenom II x4 965 (Black Edition) on an ASUS M4A87TD EVO. I'm planning to switch my core as soon ...
0
votes
1answer
88 views

Computer slows down during downloads

Last week, I reinstalled my company laptop, a HP Pavilion dv7-6b22ed. Everything was installed okay, but there is one issue I can't solve: whenever I download a file, be it a several hunderd MB file ...