Questions tagged [performance]

Questions about software, hardware or network performance. Please use as a supplement for other, more specific tags.

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57
votes
5answers
90k views

How do I determine the current MHz?

I've been trying to get an accurate reading of my Raspberry Pi's MHz, since I overclocked it in /boot/config.txt My /boot/config.txt is as following: pi@raspbmc:~$ cat /boot/config.txt arm_freq=900 ...
46
votes
9answers
73k views

Can the Raspberry Pi be used as a media center?

I am looking for a simple solution to play videos and music stored on my NAS. I've found the Raspberry Pi and projects like OpenElec and RaspBMC which will run XMBC on the board. My problem is that I'...
41
votes
3answers
60k views

Why does the Raspberry Pi need a MPEG-2 licence?

Since August 24 2012, it is possible to buy a licence to hardware-decode MPEG-2 videos. Here are my questions: Does it mean that, without this licence, the RPi cannot handle at all MPEG-2 video, or ...
39
votes
2answers
20k views

What kind of performance can I expect from using a Raspberry Pi as a webserver?

Has anyone done some web server benchmarking on their Raspi? I don't have my Raspi yet but I'm planning on using it as a web server and I'm interested to see stats for: Number of requests per second ...
35
votes
5answers
14k views

What are the overclocking capabilities?

I've not ordered mine (yet!), but I do some overclocking as a hobby to the extent that my netbook, Android phone, desktop, and even my wife's Blackberry are overclocked. Is there potential to ...
35
votes
4answers
28k views

What is the highest performing hardware configuration?

I know that exact benchmark numbers will vary between manufacturers, but in general if you only consider higher end flash drives, SD cards, and USB HDDs and your Raspberry Pi is connected to a network ...
29
votes
3answers
33k views

What speed can I expect from the hardware-H264-encoding?

I stumbled over the Wikipedia-article that the Broadcom GPU has hardware support for encoding H.264/AVC, not only de-coding. I also found an article where someone gave an example using ffmpeg to ...
29
votes
4answers
8k views

Is there anything I can do to improve boot speed?

I love my Pi, but it takes a considerable time to boot. If I want to use it as a Media Centre, it's quite important that it powers up quickly. Are there any steps I can take to improve boot ...
28
votes
6answers
26k views

What is a typical boot time for the standard Debian distribution on a typical SD card?

How long does the RasPi take to boot when using the standard Debian distribution on a typical SD card? Are we talking less than a second? A couple of seconds? 10 seconds? 100 seconds? This isn't too ...
24
votes
1answer
6k views

How do I turn on Level 2 (L2) cache?

It has been suggested to me that the L2 cache is turned off by default on the Pi, and that turning it on could improve CPU performance (probably at the expense of GPU performance). I'm keen to explore ...
23
votes
3answers
32k views

Where is the bottleneck of web browse speed on raspberry pi?

On a Model B 512 MB Pi with Raspbian “wheezy”, I have tried Midori, Chromium and Iceweasel. When the web page gets larger, loading is slow, even after I overclocked it to 1 GHz. On an Android phone ...
23
votes
4answers
22k views

Why is my SD card slow?

My SD card seems to be running slow. I have an ADATA 16 GB SDHC Class 10 card. I checked the compatibility list which lists a card with similar specifications, and it states that it is "working". Even ...
22
votes
1answer
10k views

Can I stream 1080p video from the Pi?

We all know the Pi can play 1080p video no problem, but is it fast enough to act as the basis for a file server that can stream 1080p video over its wired network connection? I'm thinking of using ...
19
votes
1answer
6k views

How can I use a USB HDD to extend the life of my SD Card?

How can I set up a USB HDD to extend the life of my SD Card and maximize the performance of my Raspberry Pi? Related: How can I extend the life of my SD card?
18
votes
8answers
36k views

Is Pi powerful enough for an oscilloscope project?

My goal is to make Pi based instruments, starting with an oscilloscope. So I read answers to What Analog to Digital Converters Are Available For RPI? How can I connect an analog to digital converter ...
18
votes
3answers
1k views

Is it possible to mine Bitcoins?

Obviously, the RPi can be used to mine Bitcoins on the CPU, but this would be very slow. Is it possible to use the GPU to mine Bitcoins?
18
votes
8answers
49k views

Will a Raspberry Pi perform well with XBMC and many movies?

I have a library with more than 1000 movies and I'm searching for a cheap but good performance media centre system. I've been using a Xtreamer Prodigy until now but it's firmware's a little slow (...
16
votes
1answer
8k views

Running 1080p video from within XOrg smoothly

The 1080p examples that work outside of X.Org run very smoothly on my Pi, but within X.Org they don't run very smoothly at all at the moment. Given that X.Org is currently not GPU-accelerated, this ...
15
votes
6answers
44k views

How can I stress test my Raspberry Pi

I recently picked up a battery powered USB cell phone charger and I'm running some tests to see what kind of battery life I will get. Right now I'm just testing at Idle. I want to also run a test ...
15
votes
4answers
31k views

Can I speed up web browsing on the Raspberry Pi?

Browsing the web using Midori on the Raspberry Pi feels very slow. I appreciate that the speed at which a web page will load is determined by a number of factors including: the speed of the network ...
15
votes
1answer
4k views

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 ...
13
votes
2answers
5k views

Why does python run relatively slowly?

I've been benchmarking the Pi on some of my simulation codes, relative to a couple of laptops I have. My codes tend to be floating point intensive, so I've been using Raspbian (which turns out to be ...
12
votes
5answers
29k views

How to change the default governor?

I want to change the default governor on my pi from ondemand to performance. Is there a way of doing this?
12
votes
3answers
22k views

CUPS is too slow, how can I make it faster?

I'm using CUPS for my Samsung CLP-315. It works very well, but it is too slow. It normally takes five minutes or more to print a single page (from pdf). When it's printing, gs is taking 100% of the ...
11
votes
4answers
10k views

SD card write speed seems to be 14 times slower than read speed

I was writing to an SD card this evening from a Mac Book Air internal card reader, and the performance reported was 1.4 MB/sec. I later read tested it on the Raspberry Pi and got 20 MB/sec. ...
10
votes
1answer
6k views

omxplayer: h.264 bitrates and encoding settings for stutter-free playback

We just received six Raspberry Pi boards with 512mb ram and plan to use them for HDMI playback. Initial tests were working great with omxplayer, but we are experiencing extreme stuttering issues for ...
9
votes
3answers
38k views

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 ...
8
votes
1answer
2k views

Hard-float and performance

Ever since the official Raspbian image came out, there has been much talking about hard-float - often cited as one of the most prominent Raspbian features, promising "tremendous performance boost". I ...
8
votes
2answers
1k views

X forwarding and GPU memory allocation

I run my Raspberry Pi headless and typically use X forwarding to run applications. I'm wondering what split I should use for allocating the RAM. I am not sure whether it is the server or the client'...
7
votes
1answer
3k views

How do I improve speed of photo/image resize? (~8MB to ~100KB)

I'm building a program which reads photos off an SD Card then resize the images and upload them to Flickr (note, it's a second SD Card reader, not the one on-board) The photos are high-resolution JPG'...
6
votes
10answers
4k views

Can the original StarCraft be played on LAN with a Raspberry Pi?

Update! StarCraft has been ported to ARM: Reddit discussion Hacker News discussion Geek.com article Download: http://repo.openpandora.org/?page=detail&app=package.starcraft So, I've unaccepted ...
6
votes
2answers
492 views

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 ...
6
votes
1answer
547 views

Lxpanel using 100% CPU (1 core)

On my Raspbian 2018-11-13 installation with all updates (sudo apt-get update and sudo apt-get upgrade), I see the CPU graph in the task bar (top right corner) at constant 25%. I opened a terminal and ...
6
votes
1answer
2k views

Could raspberry be a good choice for home monitoring?

I'm not sure if this is the correct thread to ask but I need to start somewhere What I'm looking to do is small box computer that I can mount on wall near the exit from my house that would monitor ...
5
votes
2answers
9k views

How the usage of ZRam module in Raspberry Pi Kernel improves performance?

zRam increases performance by avoiding paging on disk and instead uses a compressed block device in RAM in which paging takes place until it is necessary to use the swap space on the hard disk drive ...
5
votes
2answers
9k views

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 ...
5
votes
6answers
2k views

Ethernet speed / scp

I'm just copying a bunch of files from a RaspPi 3 to my laptop using scp over an Ethernet connection. The speed is abysmal, around 0.5 to 0.6 MB/sec. Is this normal? I read somewhere that with 10/100 ...
5
votes
3answers
7k views

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 ...
5
votes
2answers
2k views

Industrial applications

I've been wondering what's the durability of the RPI and the maximum temperature it can operate on. Is it possible to use it to replace some industrial computers? I'm thinking set-top boxes for ...
5
votes
1answer
1k views

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....
4
votes
7answers
10k views

What is the lowest power, most compatible, most compact usb wi-fi adaptor that works out of the box with the Raspberry Pi?

It seems that several people (myself included) are having great difficulty getting different wi-fi adapters to work reliably with the Pi. Some adaptors seem to require excessive amounts of power and a ...
4
votes
3answers
3k views

Expected User Limit of IRC Server on Pi 512 MB?

Does anyone have a clue of the maximum number of users RPi 512 MB could handle if running an IRC server? I'm just looking for an approximate number, is it 100, 10'000 or millions?
4
votes
2answers
6k views

Usb disk over network - performance

Using a simple setup with PI as a NAS, with an attached USB disk, like this: [RPI] (USB) -> Ethernet -> USB 2.0 Disk Of course both network and disk access share the same USB port, but ...
4
votes
1answer
2k views

Comparison of Python Gui performances

I am building a data visualization application. It is a multithreaded Gui without user interaction. I have 24 widgets that shall be updated any 100ms. 16 widgets are PyCairo rectangles and the other 8 ...
4
votes
1answer
162 views

What sort of throughput is achievabe over the USB 3.0 port on the Pi-4?

Looking to run a router application on the rPi-4, and was wondering if anyone has experience using usb 3.0 -> gigabit ethernet adapters on it - specifically what adapter/chipset worked with what ...
4
votes
1answer
2k views

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 ...
4
votes
1answer
845 views

Raspberry PI 3 - Browser, bad performance (Website with HTML5 canvas)

I have encountered a problem while developing a dashboard which is supposed to run on a Raspberry Pi 3. It is a combination of a HTML5 canvas as background to create visuals and some simple elements ...
4
votes
3answers
12k views

The Hashrate of the Raspberry Pi 2 and 3

I've been searching for a definitive answer to the above question, but somehow only seem to find semi-true statements (according to replies to these statements), or very outdated answers (for example ...
4
votes
1answer
569 views

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 ...
4
votes
2answers
314 views

Switching from 128 to 512GB USB storage drive makes computer unusably slow

I run Bitcoin on my raspberry pi 3. I have been storing the blockchain on a 128 GB USB SSD drive: https://www.amazon.com/MyDigitalSSD-SuperSpeed-Portable-External-Storage/dp/B00N0V4JG2 The ...