Questions tagged [performance]
Questions about software, hardware or network performance. Please use as a supplement for other, more specific tags.
204
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Check performance of SD card and USB flash drive
I have a Pi B+ running openelec 6.0 and I am using it as backend/frontend to record over-the-air TV programs. So far everything seems pretty good aside from some performance issues. I am interested in ...
- 113
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3
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Have people tried doing comparisons between Intel Celeron and Pi Model B+? [closed]
Has anybody documented if there had been any actual comparisons between the Pi Model B+ and an old Intel Celeron system (either desktop or laptop). I ask as, while I have seen plenty of comparisons ...
- 123
4
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SDL2 performance
Is it possible to use SDL2 with 2D hardware accelerated rendering on Raspberry Pi?
If 2D hardware accelerated rendering is possible on the device, how do you check to see that your application is ...
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0
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1
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How to: Raspberry Pi Cluster
My question is if there anyway possible to merge many Raspberry Pis to improve performance?
(eg. Run one OS in two raspberry?)
- 138
3
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Would booting off of a USB hard drive increase the responsiveness of my Raspberry Pi 2?
I love the Raspberry Pi as a computing platform but sometimes I cannot stand the sluggish performance of the device. Occasionally when I'm browsing the internet or even trying to open the regular ...
- 131
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Node.js and its require() function is too slow
I've built an application on Node.js and works instantly (in 300 ms) on Core i7 processor, Debian Scratch. When I try to run the same application on Raspberry, startup time is 7.2 seconds!.
While ...
- 287
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Youtube on Raspberry Pi 2 (Model B)
I just bought a Raspberry Pi 2 (model B) for my father.
After a few trials, which included:
installing Ubuntu Mate
installing Raspbian
I finally converged to plain Ubuntu (14.04), which works ...
- 173
5
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11k
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Ridicoulus File Server performance
I've setup a file server using my new PI, and I'm very disappointed about the performance. I have attached by USB 2.0 2.5" HDD with an USB hub, formatted using NTFS, and mounted automatically. I had ...
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19
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Why does the SD card random write performance for record size 8-128 kB drops below the performance of record size 4 kB?
When I check the performance of SD cards for random write, I can see the performance is quite bad for record size 4 kB (this is not surprising) but then for several cards it even drops for larger ...
- 351
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760
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RPi2 Or ODROID-C1 for better OpenCV performance?
I am planning for a project requiring face recognition using OpenCV and got confused between two boards at same price - the Raspberry Pi 2 and ODROID-C1.
My question is which board is more suitable (...
- 181
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39
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Trouble running Pi NoIR camera board at documented speeds
The Pi camera board is described as running HD video at 30fps or 0.033spf. I'm using the picamera python module (the only API I could find) and trying to implement the client example. At less than ...
- 221
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Maximizing the performance + life of an unsupervised RPi
Background: hobby coder running Raspbian on a Model B.
I've deployed a RPi in my brother's garage. It connects to a few temperature / moisture / etc sensors (via Python, over a serial connection) and ...
- 133
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Is raspberry pi 2 model B a good candidate as a "Download Box" or NAS
I am planning to buy Raspberry pi 2 Model B. Predominantly for two purposes,
Download Box (for Torrents, ftp / http downloads)
Web Server (For replying some requests to Local Client computers ) and ...
- 111
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New PI 2 B+ unusably slow, CPU and RAM not being used?
Just setup a new R Pi 2B+, using raspbian on a 16gb sd card, ethernet, USB mouse/keyboard and HDMI out.
Finding it extremely slow - the UI is reasonably responsive however installing monodevelop took ...
- 51
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How much performance do I lose, when running the desktop (but not using it)?
Using raspi-config you can decide whether the pi should boot into a desktop environment or not. I only use my pi over ssh so if the desktop is there or not does not matter to me at all.
My question ...
- 121
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Why is my Raspberry Pi 2 with OSMC slow?
I just installed my new Raspberry Pi 2 B model with the OSMC OS Alpha version 4. While the Pi 2 is supposedly much faster, I experience the device to be not very responsive when navigating the menu's ...
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Can I get better performance on Raspbian if I blacklist a lot of kernel modules in raspi-blacklist.conf?
I have a Raspberry Pi that is being used only for displaying a single webpage. I have the memory split set at 64M for the GPU. The display does not require sound, web-video, usb-devices, user-input. ...
- 318
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19
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40Mhz pulse counting and storing count value [duplicate]
I am new to Raspberry pi.
I need to count 40 Mhz continuous pulse for every 100 microseconds and store the count in micro SD card before next cycle starts. The process should run for 24 hours.
I am ...
- 31
2
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2
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4k
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NTFS with high CPU usage
I'm using a RPi B+ with XBian and transmission, and an external USB 2TB disk, which has an external power supply.
That disk is NTFS, and I've noticed that the CPU usage of the mount-ntfs process is ...
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127
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How can I tell if Java is performing properly?
There are many different versions of Java and many instructions on how to install the fastest Java version on a Raspberry Pi.
How can I tell if the one I've installed is using hard floats? Are there ...
- 111
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Weak performance during motion detection with picamera and python script
To dig into the picamera python api i just started a simple motion detection script. It runs in the videomode with 2 frames/second and a resolution of 320x240. Frames are captured with the ...
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502
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RetroPi on B+ - Slowness, music glitches when WiFi connected
I have a B+ with retropie 2.3 installed.
I've sucessfuly connected a TP-Link TL-WN722N WiFi dongle.
It seems that most roms run slower and have music glitches when dongle is connected. When I ...
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Execution time performance when counting up to 1,000,000,000
I have made a simple C++ program that simply counts up a variable to 1,000,000,000 and then displays the time it took. I used a simple for loop to do this.
for(long n=0;n<1000000000;n++);
The ...
- 33
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367
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Is it normal to irssi freezes when receiving dcc?
I'm running it over screen with Raspberry Pi Model B, but when a streaming begins, I am unable to type anything, even Meta + Arrow doesn't work, but changing screen's window with Ctrl + A # works, so, ...
- 111
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329
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How to make an kiosk type application for the car? [closed]
How would I create an application that is the first and only thing a user sees?
I want to create an application for my car. The app will need to boot as quickly as possible and completely take over ...
- 121
2
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3
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5k
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Optimising raspbian performance for python script
(I know this is probably the most overkilled question but)
I've designed a pretty heavy code/script in python, which yes would have been better implemented in c, but in saying that short of over ...
- 372
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192
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Does my raspberrypi take up resources if I startx but remote ssh into the machine?
I was wondering how to get the best performance out of my pi and currently the gui is started with startx automatically on boot, however I intend on using the pi remotely.
My question then is: does ...
- 225
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Is Raspberry Pi powerfull enough for commercial web development?
I'm considering buying a raspberry for everything work related, especially software development for the web, since i'm a software engineering student and web start up founder. I would like to know if ...
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234
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State of art in performance of Raspbmc
I'm using Raspbmc and it's awesome. But i feel a (in my opinion) huge delay to load videos. So I started to find bottlenecks. So here are my changes:
Using a very good quality SD card, which has a ...
- 352
2
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0
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838
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Running a webserver unikernel on RaspberryPi
Is there anyone who have tried to install a webserver unikernel on a Raspberry?
In both cases, is it something possible and could one run an efficient webserver from it? What are your thoughts on ...
- 21
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Optimising ImageMagick Conversions for Raspberry Pi
I've been working with ImageMagick on the Raspberry Pi (model B) and have noticed a bottle neck in the area of image conversions.
When converting between bmp, jpg, png, etc. the speeds are acceptable ...
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399
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Fast os for Raspberry Pi [duplicate]
I'm creating a project with raspberry pi and I need an "os" which boots in a few seconds when the power is turned on. The os has to have the following features:
audio driver (3.5mm)
c/c++ running ...
- 11
3
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0
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902
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Is RaspberryPi OpenCV fast enough to run eye blink recognition?
I would like to create application that can recognise eye blink recognition on RaspberryPi with Raspberry Pi Noir camera.
Eye blinks are fast, so I will have to process many frames per second.
Is ...
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How to achieve gpu_mem=8?
I see some people claiming (see links) they have a memory splitting of gpu_mem=8, but I always thought 16/496 is the minimum split?
Here is an answer on this very page: https://raspberrypi....
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609
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Why has Raspbian enabled swap by default if that is bad?
I always read that swap on a Pi should be disabled because enabling it lowers SD card lifetime and is very slow anyways (no performance gain with swap). So I disabled it.
But is there a good reason ...
- 453
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1
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How many applications can a single, optimized SSH-only Raspberry Pi B handle?
How many "passive, common, server-like tasks" can a single home-used RPi perform in parallel? There are many things you can have a RPi serving, like a NAS, a webserver (PHP+SQL), a git repository, a ...
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5
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Raspbian is very sluggish. Almost unusable
This is my first time posting in this forum. I have the Model B board 512mb version, a class 4 16gb SDHD. I bought my Raspberry Pi yesterday and tried to load Arch Linux with no avail. I am a fairly ...
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Raspberry Pi + ASIX AX88772: poor performance as a LAN/Broadband gateway?
In a bid to quieten my room, I'm attempting to replace a generic box (2 nics) with an ARM (raspberry pi, the 512mb model) as my Internet gateway/firewall.
My research selecting components, lead me to ...
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2
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2
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10k
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Speed up samba media performance
I have my RPi media server setup using an external HDD mounted using ntfs-3g (ntfs formatted needs to mount on windows) and Samba to share the drive in the network. Currently, I have 1 client (MacBook ...
- 23
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1
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How to choose between an all-in-one server or multiple Raspberry Pi?
I have one Raspberry Pi (with 256MB of RAM) and a lot of ideas to do with it. For example:
Download center with transmission, amule, etc.
Web server with static webs (or few PHP code) and few visits ...
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256
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Transputer Emulation
Given that next year is the 30th anniversary of the Inmos Transputer, I'd like to try to set up a sort of emulation of the distributed architecture using the RPi. Although I'm only at the planning ...
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171
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Performance drops after a few seconds
I am running a computer vision program on a Raspberry Pi (Linux raspberrypi 3.10.19+), and when it firsts begins, each iteration of the main loop runs in 6 ms. After a few seconds, the time per loop ...
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219
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Which config ? tomcat nat or combo tomcat+mod_jk+apache
I just received my Raspberry pi which I plan to use for a gwt webapp.
In performance view, what will be better to do ?
only tomcat with NAT to serve my http external port
serving static content (....
- 119
9
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3
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40k
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Can you make a high-power NAS from a Raspberry Pi?
I am completely new to Raspberry Pi, and don't know a lot about it. My knowledge on hardware, software and programming (except for basic Python) is also very limited.
However, I read you can make a ...
JNat♦
- 193
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RaspberryPi program takes 100% cpu [closed]
Why my program takes 100 % CPU even if its a helloworld program. Is it normal behavior?. Can anyone tell me the reason for this?. I am using debian wheezy.
Here is the screen shot of process..
- 103
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677
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Fast, Userland GPIO
I need fast (>10 Khz) userland access to the GPIO pins.
Are there any options available? /sys/class/gpio based GPIO is too slow (I've tested it), and having to have your application run as root is ...
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Slow file transfer to USB thumbdrive
Currently my files are transferring at a speed of 10 kilobytes/s or less to a thumbdrive that is Fat32 formatted. I have a pretty stock Raspian install, and I've done an rpi-update. I am using a ...
- 151
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4
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1k
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Which would be faster? Computing 2000 MD5 hashes on the fly or cache them on SD?
Without going much into details, I'll have a Pi working as a game server. Players make requests to that server. For each player, the Pi will have a table of pre-computed MD5 hashes corresponding to ...
- 121
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4
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RPi extremely slow download speed
I am trying to set up my Raspberry Pi as a small home server, and I am having issues with my download speed. My Windows PC is getting up to 6mb/s, the Raspberry Pi is doing a dist-upgrade, and is ...
- 41
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What kind of data rate can I expect from the Raspberry Pi's MPEG Hardware codec?
What kind of data rate can I expect the hardware coded to decode smoothly?
While playing a video on VLC Player, I can choose Tools > Media Information > Statistics Tab Here I can see the bit ...
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