Questions tagged [performance]
Questions about software, hardware or network performance. Please use as a supplement for other, more specific tags.
204
questions
65
votes
6
answers
125k
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
...
- 963
48
votes
9
answers
75k
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'...
- 583
44
votes
3
answers
63k
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 ...
- 3,693
43
votes
2
answers
23k
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
...
- 753
38
votes
5
answers
15k
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 ...
- 2,103
36
votes
4
answers
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 ...
- 2,927
33
votes
3
answers
41k
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 ...
- 535
32
votes
6
answers
34k
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 ...
- 1,459
30
votes
4
answers
9k
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 ...
- 22.5k
27
votes
5
answers
33k
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 ...
- 1,092
25
votes
1
answer
7k
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 ...
- 2,912
24
votes
3
answers
34k
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 ...
- 343
23
votes
1
answer
11k
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 ...
- 10.9k
22
votes
6
answers
81k
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 ...
- 1,092
21
votes
1
answer
7k
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?
- 5,883
19
votes
8
answers
39k
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 ...
- 193
19
votes
3
answers
2k
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?
- 15.4k
19
votes
8
answers
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 (...
- 291
19
votes
1
answer
6k
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 ...
- 351
17
votes
7
answers
57k
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?
- 959
17
votes
4
answers
35k
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 ...
- 5,883
17
votes
3
answers
30k
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 ...
- 325
16
votes
1
answer
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 ...
- 10.9k
13
votes
4
answers
11k
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. ...
- 489
13
votes
2
answers
6k
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 ...
- 2,912
11
votes
3
answers
7k
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 ...
- 2,315
11
votes
1
answer
7k
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 ...
- 211
9
votes
1
answer
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 ...
user13
9
votes
3
answers
40k
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 ...
JNat♦
- 193
9
votes
2
answers
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'...
- 193
7
votes
1
answer
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'...
- 73
7
votes
1
answer
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 ...
- 73
6
votes
3
answers
5k
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 ...
- 1,289
6
votes
2
answers
10k
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
...
- 161
6
votes
10
answers
5k
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 ...
- 113
6
votes
2
answers
608
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 ...
- 453
6
votes
3
answers
20k
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 ...
- 204
6
votes
2
answers
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 ...
- 161
6
votes
1
answer
2k
views
Why is my simple HTML Canvas rendering only 11fps in Chromium a Pi3?
I've written some simple HTML games for my kids on the Pi. The latest one uses a Canvas but the performance is terrible (and I get the yellow "running hot" square).
I measured by code running in my ...
- 251
5
votes
7
answers
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 ...
- 428
5
votes
2
answers
11k
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 ...
- 153
5
votes
6
answers
3k
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 ...
- 502
5
votes
2
answers
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 ...
5
votes
1
answer
260
views
How is CPU in Raspberry Pi 4 +36% faster than for Raspberry Pi 3?
CPU benchmarks show that the Raspberry Pi 4 outperforms Raspberry Pi 3 by +36%
https://www.geeks3d.com/20190930/raspberry-pi-4-vs-raspberry-pi-3-cpu-and-gpu-benchmarks/
How is this possible given the ...
5
votes
3
answers
8k
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 ...
- 51
5
votes
1
answer
2k
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....
- 453
4
votes
4
answers
3k
views
Does Raspberry Pi runs Minecraft and Netbeans 7.2?
I have a computer with 512MB of RAM Memory, CPU Intel Celeron 1.60GHz and a 80GB HD. After the new Minecraft update to 1.3.X, Minecraft don't run on my computer any more even on Windows XP and Lubuntu ...
- 143
4
votes
4
answers
37k
views
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
4
votes
3
answers
4k
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?
- 150
4
votes
2
answers
6k
views
Performance difference Raspbian versus Gentoo
Is there a measurable difference in CPU performance between Gentoo and Raspbian?
With Gentoo you use different compiler flags and with the USE flags compile only what you need. In Raspbian all ...
- 1,608