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Questions tagged [performance]

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

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23
votes
4answers
23k 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 ...
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?
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 ...
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 ...
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 ...
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 ...
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 ...
12
votes
5answers
30k 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?
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 ...
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 ...
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?
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 ...
2
votes
2answers
583 views

Pi3B+ automatically shutdown while the temperature is less than 65C

I'm using Raspbian Stretch with desktop which published at 2018 JUNE. I'm doing some performance testing with Pi3B+ by running my application, the application is just keep send/write data via TCP/IP ...
57
votes
5answers
91k 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 ...
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 ...
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 ...
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. ...
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 ...
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 ...
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
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
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 ...
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 ...
5
votes
1answer
1k 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 ...
4
votes
1answer
2k views

SMB performance issues on Raspbmc

I'm having some serious performance issues (i think) using raspbmc to stream videos/music from my windows XP machine. The setup is as follows: In the attic : Windows XP P4 3.4Ghz 4Gb ram, edimax ...
2
votes
1answer
4k views

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 ...
3
votes
2answers
1k views

Finding cards optimized for random read/write

In a recent article on the official Pi site the authors mention that a class 4 SD card which is optimised for random read/write can be faster than a class 6 or even a class 10 card which is optimised ...
0
votes
0answers
492 views

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 ...