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

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6
votes
0answers
500 views

Poor write performance on ecryptfs

I did a bit of benchmarking with ecryptfs and dm-crypt, and got some interesting results. All the following were done with a Btrfs filesystem, using dd to copy a ~700MB file to/from a ramdisk with the ...
4
votes
0answers
25 views

Why symlinks can slowdown git?

I keep my current working project on SSD drive but git folder inside is symlinked from another (encrypted) disk with mklink /J /D. SmartGit warned me that using symlinked git folder may have a ...
4
votes
0answers
326 views

Copying from WHS 2011 backup very slow

I'm setting up a new computer to replace one of my old ones, and part of doing so is extracting my Home folder from a backup I made just before wiping the old one. However, copying from the mounted ...
3
votes
0answers
52 views

Transferring large file to/from USB drive causes system to hang until transfer is done

I have a box running Ubuntu 16.04 server. It has an internal SATA hard drive with the OS on it, and an attached USB 3 hard drive which I use for storage of large/long term files. A lot of times, this ...
3
votes
0answers
77 views

SSD is slower on PC

Yesterday I bought Samsung 850 Evo 250GB. It's now my boot drive and has Windows 10 pro installed on it. I benchmarked the SSD with Crystal Disk benchmark. All the scores reported by crystal disk ...
3
votes
0answers
60 views

Clonezilla disk to image speed decreasing over time

I am actually backing my whole 2tb disk using Clonezilla disk-to-image option. I don't use any encryption or anything that I know that could slow down the process, and yet, Clonezilla tells me that ...
3
votes
0answers
76 views

How to load entire process memory from swap quickly (linux)?

I run a bunch of CPU-hungry processes in parallel, they normally use a few GB of memory each. From time to time they allocate large amount of memory too (say 150-250GB). Usually at most one of the ...
3
votes
0answers
120 views

MMC card reader slow on Linux

I have been searching in and out on google and the forum about the issue I am experiencing with Linux, with no luck so far. This is my system: System: Host: wally Kernel: 3.13.0-37-generic x86_64 ...
3
votes
0answers
222 views

Ridiculously slow read/write between two SSDs (Linux)

So I have a Kingston SSD (120Gb HyperX 3K; SH103S3/120G) that is about two years old and just picked up a new Kingston SSD (240GB SSDNow V300; SV300S37A/240G) to go along with it. I’m trying to ...
3
votes
0answers
235 views

Intel RST driver - magic performance boost (only) up till version 11.2.0?

what's the magic behind the massive write speed performance boost by intel RST drivers up till and including version 11.2.0? i have done some performance measurements of my application that is ...
3
votes
0answers
66 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 ...
3
votes
0answers
740 views

HDD very slow performance after full copy from SSD

The PC: Core i7-4770, 16GB RAM. There are 120GB SSD and 1TB HDD (new without any bads). On the SSD I had Windows 8.1 installed with all other stuff. Someday all programs exceeded 120GB limit and I ...
3
votes
0answers
626 views

LSI SAS 2308 MPT2SAS Linux Read/Write performance

LSI SAS 2308-8e (6Gb/s per Lane) PCIe 3.0 card. Average Read/Write Raw performance for 4 SSDs is very low around 430 MB/s (Expected 2 GB/s).I am having Intel Core i3 with quad cores and 4 GB RAM. xdd....
3
votes
0answers
2k views

Windows 8.1 Process Migration Limits CPU frequency scaling

Summary: I've noticed that with Windows 8.1 on my laptop, running a single CPU intensive program does not cause the CPU frequency to scale to its maximum value. I suspect that this is because of ...
2
votes
0answers
29 views

Win7 keeps warning me about “slow performance” and disables Aero & UI effects. It is decidedly wrong

In the last few days, Windows has started giving me warnings about "slow performance" and subsequently disabling Aero and all the UI effects. I'm getting this a few times a day. This is Windows 7 ...
2
votes
0answers
45 views

Chrome auto-fill saved passwords is very slow

I have been a Firefox user for more than 10 years; all my passwords are saved by Firefox password manager and protected with a master password. Now I want to move to Google Chrome (ubuntu 16.04), so I ...
2
votes
0answers
131 views

SSD causes UEFI to load very slow on reboot (~15 sec)

I've recently bought an ADATA Premier Pro SP900 128 GB M.2 . It works fine , it's fast , but I have one issue with it . When I start the laptop , UEFI loads fast in a second or so , goes to my ...
2
votes
0answers
217 views

Is a VeraCrypt partition slower?

I just got a new external hard drive. I want to create an encrypted partition on it with VeraCrypt. I did the same thing with a similar drive. I just copied a file over to it and the speed was about ...
2
votes
0answers
629 views

explorer.exe, windows 10 slow login with one user

I have 3 users on my computer using Windows 10. One of them recently became slow to login (6 seconds instead of 2). I looked in event viewer and both users have the same history when loging in. It ...
2
votes
0answers
88 views

How to increase performance of Adobe Creative Suite 6 via hardware upgrade?

A friend (who doesn't have a SO/SU account) has had a licence of Adobe CS6 for some time. Mostly uses Photoshop and InDesign. He doesn't want to upgrade to Creative Cloud for the reasons such as ...
2
votes
0answers
685 views

MIcro SD card gets slower after partial fullfillment

I have a micro SD card from Kingston - 32GB class 10 When i'm writing on it using usb card reader or my phone, average write speed is about 6MB/s But after about 10GB of data written into it, ...
2
votes
0answers
1k views

How to improve the wifi performance of openwrt

If my computer download through my tplink router, the speed is 10Mbps, if through openwrt router, it's 5Mbps. Here is wifi information: root@localhost:/etc/config# iwconfig wlan0 wlan0 IEEE 802.11bg ...
2
votes
0answers
630 views

Slow write speed on external SSD

I am experiencing slow write speeds using an external Inatek USB 3.0 2.5" External Enclosure (UASP supported) with a Samsung 840 120GB drive. I just started using this setup on a late 2013 iMac as an ...
2
votes
0answers
195 views

Show dial up connection status in Task Manager

In Windows 8.1, Task Manager shows Wi-Fi, Disk, CPU usage graph in Performance tab. But, it doesn't shows usage of a dial up internet connection. How can I add dial up stats in task manager. Here are ...
2
votes
0answers
158 views

some programs running much slower after mscvrt runtime redistributable delete/reinstall

UPDATE: It appears that there may have been an unfortunate coincidence. It seems that right around the time I was doing these builds and deletions of redistributables, my laptop power adapter was ...
2
votes
0answers
482 views

USB Keyboard and Mouse slow to activate using docking station for Lenovo T430

I just recently upgraded to a T430. Happy with the laptop but one thing I find annoying is that when I use it through the docking station - it takes several minutes ie 3-5 for the USB keyboard and ...
2
votes
0answers
264 views

What desktop computer hardware specifications are most important for database heavy applications?

I am purchasing a new personal desktop computer with the hope of improving performance for database-heavy applications (mostly data mining). I will want versatile hardware for all sorts of future ...
2
votes
0answers
875 views

Too much disk activity READING event logs

On Win 7 SP1 x64, I notice that sometimes the disk gets so busy that Windows becomes unresponsive for minutes at a time. I referenced this problem on SU in the past once. I've since replaced the drive,...
2
votes
0answers
603 views

Super slow SDD write speeds with RAID 1

I have a very new computer system, configured in RAID 1, but was surprised that the write speeds were extremely slow! Here is a snapshot of my computer setup: Motherboard: Asus Z9PE-D8 WS ...
2
votes
0answers
175 views

How much performance reduction is ok for a linux router?

I am having thew following (simplified) setup: I have a private Subnet where my PC is located. The subnet goes over a virtualized server into the internet. The server uses internally two subnets: One ...
2
votes
0answers
501 views

Problems with buffered disk read performance

I have two identical linux boxes (running ubuntu 13.4) with identical hardware including a WDC WD20EARS hard disk. I noticed that my main system got unsually slow and performed a number of HD tests. ...
2
votes
0answers
1k views

Buffalo Router WZR-HP-G450H slow and unstable

I bought a Buffalo WZR-HP-G450H router. Problem 8 device connected to it via wireless. When power it on, the connection speed is very fast, about 5MB/s while transfer files between a wired server ...
2
votes
0answers
105 views

Low bandwidth only on Windows XP

Hi I own really old PC and I've 10Mbps/1Mbps Plan. Internet is distibuted with router over whole house. The old PC uses 802.11b (up to 11Mbit/s download) Wifi card and has Windows XP+SP3 installed. ...
2
votes
0answers
693 views

nfsstat authrefrsh almost equal to calls

I mounted a dir from my server through nfs (v3) on my LAN and if I run nfsstat I get # nfsstat -rc Client rpc stats: calls retrans authrefrsh 2527772 0 2527782 Is this ...
2
votes
0answers
1k views

When tab groups are loaded, Firefox becomes unresponsible for minutes (Unresponsive script)

I have several tab groups (~ 20) in Firefox. I can start the browser without any problems. However, as soon as I … click at the "Group tabs" icon in the toolbar, or right-click on a tab and hover ...
2
votes
0answers
333 views

Improving Chrome performance on OSX

There are a number of sites that do not display properly on Safari and I need to switch to Chrome. Although when the content of the sites requires flash player, Chrome will consume a significant ...
2
votes
0answers
422 views

Microsoft Security Essentials: keep download scans but disable local activity scans

In Microsoft Security Essentials, I used to disable "Monitor file and program activity on your computer" but enable "Scan all downloads." Now, Microsoft Security Essentials (MSSE) 4.0 removed the ...
2
votes
0answers
81 views

Which Windows services and startup programs can I disable/modify to optimize performance/security?

For Windows Vista SP2 and Windows 7: I use this stand-alone (no LAN) computer at home exclusively to browse the internet, nothing else!.. I have another computer I use for development and testing ...
2
votes
0answers
111 views

Laptop is super slow on network

So on our network we have a bunch of wireless macs and window Operating laptops, we have a network setup with 802.11g,b,n. All the laptops seem fine except one which is only getting speeds of 54Mb. I ...
2
votes
0answers
104 views

Have anybody tested R multicore packages on 10-core Xeon how do they scale in comparison with case of 4 core machine?

Have anybody tested R multicore packages (for example : parallel, multicore, snowfall, foreach) on 10-core Xeon ? How do they scale in comparison with case of 4 core machine ? What algorith have you ...
2
votes
0answers
1k views

Can I disable Windows 7's indexing/scanning of dvd contents?

When I try to copy data from a DVD on my Windows 7 machine, I keep running into this problem. I open the DVD drive in windows explorer to browse the files, select the ones I wish to copy then paste ...
2
votes
0answers
808 views

Moving files to outside of hard drive platters?

Currently I am working on cheap ways to improve my hard disk performance on my PC. I know that one way to do so is short stroking, but I would like to utilize my entire disk, not just part of it. I ...
2
votes
0answers
46 views

Are there guidelines for the performance implications of adding multiple usb/firewire drives to a Mac?

I have noticed that I get a significant performance drop on a Mac Pro with more than 5 daisy chained firewire 800 drives. Task switching grinds to a halt, and the machine often beachballs between ...
2
votes
0answers
1k views

PowerPoint really slow for A0 size poster; how do I speed up?

I'm making a poster of my physics research project for a conference. I don't have time to learn LaTeX at the moment, and I need to be able to type inline equations within text boxes - the only ...
1
vote
0answers
48 views

GPU VRAM bandwidth importance for neural net training

my Question in short is: Is the VRAM bandwidth of a GPU really the bottleneck regarding Deep Neural Networks? Longer Version: A guy named Tim Dettmers wrote in his blog, that all the relevant ...
1
vote
0answers
79 views

SSD is very slow on PC

Yesterday I installed Samsung 850 EVO ssd in the place where HDD was installed on my HP Pavilion Dv6t 6c19tx. Then I installed fresh Windows 10 pro on it and everything went smooth. I didn't notice ...
1
vote
0answers
62 views

Does Synology Hybrid RAID (SHR) have faster read/write speeds than a single HDD?

So I have 4 of the same drive (5400 RPM WD Red's) in SHR. Since there is data parity (same chunks of data exist on multiple drives), will the read speed be greater than that of a single drive? Could ...
1
vote
0answers
10 views

How to decide how to parallelize nested loops on GPU?

Suppose I have an algorithms which I want to implement on a GPU. The algorithm consists of a main loop, and all iterations of the loop can be run in parallel. Also, each iteration of the loop has an ...
1
vote
0answers
21 views

Why does moving/deleting files “stall” on my PC?

My PC is Windows 10, 8GB RAM and a 2.8GHz processor. Basically, to give you an idea, whenever I drag any item onto the desktop or into a folder the file takes a long time to appear and I have to ...
1
vote
0answers
223 views

Abnormally slow CPU speed in Windows 10 Task Manager, with virtualization disabled

In Windows 10 Pro Task Manager, CPU speed shows a constant and unchanging value of 1.18GHz, while nominal CPU speed is 2.50 GHz. Dual Intel Xeon E5-2680 v3, on a Intel S2600CW2S server board. Per ...