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

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Exteremly Slow Microsoft Excel operation in LENOVO G550 series Laptop; Shall I add more RAM?

I am doing complex Macro operations in Excel 2007/2013 which generates random numbers and does many multiplications/divisions in each cell value. It also copies data to multiple worksheets and text ...
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16 views

Entire network sluggish after virus

I am almost positive that I got a virus from en.savefrom.net, although both Windows Defender and Avast found nothing. The Internet has become sluggish for all devices on the network, including PCs, ...
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56 views

How can I create a RAM disk and install Firefox into it?

I've a Fedora 22 64-bits system running under a notebook with Intel Core i3 processor and 7.7GB of RAM. I only use about 2~3GB of RAM (with everything I need) and I want to speed up my system, so I've ...
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765 views

Often mouse stutter on windows 10

I have a really annoying issue where windows 10 freezes/stutters almost every second for a small period of time. It's best noticeable when I move my mouse around in circles. As the mouse moves, every ...
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51 views

Is there a pentium equivalent of any i-series processor?

I have a confusion with speed of processors and I want to know what makes say, i3 faster than pentium processor which pentium doesn't have? If we add more GHz to pentium will it be same as i3 in some ...
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21 views

How to choose graphics card update (for 3D Vision gaming)

I have a fairly-decent gaming computer at home but I am not satisfied about its performance on Far Cry 4 with 3D Vision enabled. Even at 720p@24Hz resolution the game becomes often laggy. Surely my ...
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225 views

Router getting ridiculously slow internet connection on 2.4GHz band

I've got an ASUS RT-AC68U router which is performing perfectly fine at 5GHz. However, download speeds don't get faster than 25kbps on the 2.4GHz band. I have a 10mbps broadband Internet connection. ...
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18 views

Handling exported reports from BI portal in Excel 2010 causing performance issues?

So, I'm going to try to describe this the best I can. Multiple uses at my office will often export large reports from the BI system of the SAP web portal. These files can be as large as 25-50mb, ...
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52 views

Computer slowed down - no virus/fragmentation issues I can see

OK, here's an obvious question which typically gets the "fragmented drive and/or virus and/or too many programs running" answer. The thing is, I'm not a dummy (I'm a software engineer, although not ...
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42 views

How can Chrome browser cookies cause internet issues?

Alright, so I'll make this as short and concise as possible. I have both DishNET and mobile data/hotspot for internet. I noticed DishNET was really slow today(I would estimate less than 5KB), so I ...
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51 views

Internet is slow on some websites: Can't login to StackExchange using Google account

I recently switched to windows 8.1 (64 bit) on my new laptop. While the internet for some websites is fast enough, but it slows down on some other websites and even doesn't open them, for example I ...
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148 views

Native Windows Libraries Under Wine

As we know, Wine has the ability to run windows native Dlls instead of it's own library files. For example you can use the original d3dx9.dll instead of wine's own d3dx9.dll implementation. Does ...
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39 views

Slow-down of Web Applications due to Windows DPI Scaling?

I have increased DPI scaling from 100% to 125% to improve display readability. The result looks quite pleasant on my 24" screen (resolution 1920 x 1200). Now, a colleague warns me that certain web ...
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16 views

Data transfer in sql server 2008

I have following requirement In SQL server 2008,Trying to implement in stored procedure source table T with 100000 records need to be insert into destination table T1.A Job will be schedule for ...
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146 views

Windows 8.1 Slow startup for 16GB RAM

I have lenovo Y50 laptop with 16GB RAM and 1TB hdd, When I start system, or start from hybernet mode, It consumes 100% HDD usage for 5-7 minutes, after digging this issue, I got the root cause is ...
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103 views

Getting best performance out of a virtual machine

Host Machine: Windows 8.1 Intel(R) Core(TM) i7-4700HQ CPU @ 2.40GHz 2.40 GHz RAM: 24GB System Type: 64 bit OS, x84 processor What I've been running as a virtual machine Windows 7 12GB Memory 2 ...
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72 views

Excel performances: INDIRECT+ADDRESS VS CELL+OFFSET

Using Excel I can achieve the same result using two different approaches, here are the formulas: A) =INDIRECT(ADDRESS(5+MATCH($A$16,Aliquote!$A$5:$A$15,0),1,1,1,"Aliquote")) B) ...
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74 views

Large TTFB on Vagrant

I have a ttfb of approximately 15-20 seconds on a VVV vagrant install. I am using virtual box on windows 7 in case that makes any difference. I have tried reprovisioning and also tried increasing the ...
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19 views

What is the difference between monitoring only one host and cloud?

With the cloud computingtechnology is used very extensively, I am very curious about what is is the difference between monitoring only one host and cloud. For example, I can use top or ps command in ...
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42 views

HTML5 web content really slow, somehow caused by ethernet driver

HTML5 content is really slow for me, browser independent. It seems that my ethernet driver crashed recently, causing HTML5 videos and other content to load slowly, get stuck etc. I updated the driver ...
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35 views

What parameters should I consider when comparing two CPUs?

When comparing CPUs, it seems that basic parameters such as the number of cores or the clock rate are not enough. For instance, on a popular French e-commerce site, Intel Xeon E5-2620 v3 (2.4 GHz) ...
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32 views

Prevent KDE from swapping

I've realized that my laptop was overheating as a result of lots of I/O, so I searched for the programs who used swap, and I found the following: $ pgrep kwin 13387 $ pgrep plasma-desktop 13424 $ cat ...
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72 views

Would this registry change affect you or your users negatively?

Would this proposed registry change affect anyone's PC they take care of, or any software you are involved in creating or supporting? If I proceed, it's possible you would see this change on a PC you ...
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42 views

How much barring does the CPU, BUS and Motherboard have on a pfSense system?

I am planning on turning an old Pent 4 system into a pfSense box using (4)100Mbps ports and I have a 50/50 fiber connection currently for $25/mo and was wondering if I would by at any rate slow the ...
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31 views

Performance degradation migrating the OS on SSD to bigger SSD

I'm planning to buy a bigger SSD but soon a question came up to my mind: would my performance fall down after moving the OS on the bigger SSD (like it happens from HDD > SSD without clean install)? In ...
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13 views

Performance issues after migrating to a new server with better hardware config

I need help optimizing a server. We are currently using a pc with below configuration as a server (current) for Sugarcrm. Processor: RAM: 16GB Hard disk: SATA 500GB 7200 rpm OS: Ubuntu 12.04 LTS ...
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125 views

DNS resolution takes too long

[Reposting here because it was deemed off-topic at Stackoverflow] This is regarding a home internet connection via a cable modem. All of a sudden Chrome takes ages to render a page. Whenever I type ...
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350 views

Extremely slow USB transfer rate in ASUS Windows 8.1 USB 3.0

I have an ASUS N56JR. It has several USB 3.0 ports. I have 5TB back-up drive which I manually backup my files to. This slow transfer rate happened right after we had a power-outage during a ...
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34 views

Is HDFS concurrent reading less efficient than reading a replicated copy?

If I have two identical files A and B on HDFS, and then have two simultaneous read tasks on those files. Is scenario 1 faster? Scenario 1: read A + read B Scenario 2: read A + read A If the ...
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63 views

Can't solve mysterious 20 seconds http delay

I read a few similar questions, but they seem to be always different somehow. The situation here is very puzzling: for a handful of websites, I get a roughly 20 seconds delay when requesting any page ...
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60 views

How can I tell if antivirus is causing performance issues for CPU intensive tasks on a machine?

My company publishes simulation software that regularly performs prolonged CPU (and GPU, and occasionally I/O) intensive tasks. Our userbase are engineers, of whom some are embedded in large ...
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172 views

Why am I exceeding my VRAM limit in my games and not suffering from dramatic frame rate drops?

Just like my other question, this isn't by any means a problem I'm complaining about, this is just something I want to know the secret behind. System Specifications CPU: AMD A10-6790K 4.0 ...
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21 views

Win7 Plug&Play-Daemon slows down Internet browser

I currently have a strange problem on a windows 7 system at work. Browsing the web with Firefox or Chrome is awefully slow. Even the browsers themself are slow. e.g. highlighting a button with a ...
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17 views

fio: can't generate filenames based on jobnames

I am trying to benchmark performance using fio. Unfortunately I have some issues with fio (2.2.8 from git) and the interpretation of the manual. The manual reads (line 142, HOWTO): If no filename ...
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129 views

Bad performance after re-install windows

Lately my laptop was having trouble playing certain games because the disk would go to 100%, after trying multiple things to fix it without succes I decided to start from scratch and reinstall ...
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58 views

Does putting virtual machines in separate partition affect performance?

I have a 500 GB HDD in a laptop. I partitioned it into two drives so I could leave the C drive for windows and the other drive E for virtual machines. I run CrystalDisk benchmark on the C drive and ...
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4k views

Facebook load times are very slow, but other pages are fast, and >12Mbit/s up & down

I have measured 12 Mbit/s up and downstream. I have a wireless Network Adapter called Asus PCE-N53 (300Mbps 11n Dual band Wireless LAN PCI-E Card) and is connected to my local wireless router. I have ...
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219 views

Fast Wi-Fi speed on smartphone but slow on notebook

I have a Lenovo G710 notebook and a Samsung Galaxy Note 3 smartphone connecting to a Linksys E1200 AP. The Wi-Fi speed on my G710 is extremely slow compared to the Note 3, and half of a month on, ...
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182 views

Set Windows 7 to “Performance optimized” under Visual Effects with Batch script

I have this .bat script to start a specific game: @echo off if not "%~1"=="p" start /min cmd.exe /c %0 p&exit start "" "GTAVLauncher.exe" timeout /t 60 /nobreak >nul taskkill /f /im ...
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187 views

Hard Drive R/W Speeds are Limited to about 3Mb/s

My mom's Acer laptop is super slow. However, when I open the task manager, the limiting factor of its performance seems to be the hard drive, which is usually maxed out at 100%, though only operating ...
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130 views

How can I improve the performance of my computer?

I have had my computer for a long time now and even though I try to keep things clean, it seems relatively slow. Particularly, the windowing system seems to lag frequently. Windows fade in slowly ...
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25 views

Speed with multi-cpu motherboard

I'm looking at building a dual-cpu system, but I was wondering if there were any concerns with bottlenecks that I should be aware of since data is going to two different places now. I know that each ...
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36 views

Gateway NV5398U hard drive very slow to respond after upgrade from Windows 7 to Windows 8.1

This old but fully functional notebook PC worked as expected with Windows 7, just as fast (or slow, rather) as it was when new. After installing Windows 8.1, the graphics drivers were manually ...
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118 views

How can I determine whether the disk read and write speeds on Windows 8 task manager are normal?

On Task Manager, when I start a heavy application and monitor its start on Task Manager, my disk's read and write speeds remain between 1MB/s and 2MB/s with some peaks at 10MB/s in rare cases. ...
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115 views

Internet speed spiking/going extremely slow on my pc for on ethernet for no reason?

guys my connection is spiking like crazy and only on my pc, it's been happening for days now and i have no clue why, on win8 and win10 speedtests like this when usually its something like this ...
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128 views

Mismatched upload vs. download speeds between two computers on the same home network

I'm busy setting up my Plex server on a separate Wi-Fi router and I'm testing the transfer speeds between two MacBook Pros. It's just got me baffled because I've come across something weird. Not ...
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43 views

RHEL upgrade makes AIDE to run slower

ALL, For our product we upgraded from RHEL 5 to RHEL 6. Unfortunately AIDE tool that we use for intrusion detection started to slow down it's scan for about 2-2.5 times. I checked and the ...
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21 views

Windows Server: Statistics

I have a small home server running Server 2012 R2. I would like to be able to view general statistics about its performance including counters for CPU, memory, disk, etc. Ideally this would be ...
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54 views

Extreme speeds from a hard drive that shouldn't be this fast?

I have a Seagate 7200rpm drive and for some reason ATTO Disk Benchmark concludes that this drive is around 220 MB/s read and write. Isn't this unrealistic for a drive of this kind? ATTO displays the ...
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116 views

RAID to handle 800 random blocks per second

This is a homework. We are supposed to pick HDD, imagine we are buidling RAID to handle 800 random blocks per second (550 reads/250 writes). I have picked RAID5 made out of 3 HDDs. But it is too ...