The ethernet-1's intro from anklimov

ethernet-1's Introduction

#Ethernet Library for Teensy#

Wiznet chips W5100, W5200 and W5500 are automatically detected.

Efficient block mode of W5200 & W5500 are used for data and multi-byte register access.

Wiznet socket registers are cached, which greatly reduces SPI communication overhead, at the cost of a small increase in RAM usage. TCP connections and UDP packets accessed in small chunks typically see a substantial performance boost.

Adafruit's Ethernet.init(CSPIN) extension is supported, to allow use of different pins for the chip select signal. Optimized direct register I/O is used for most Arduino compatible boards.

http://www.pjrc.com/teensy/td_libs_Ethernet.html

Tested Hardware

Board	Chip	Shield / Module	Internet	Local
Teensy 3.6	W5500	WIZ850io	97.37	1190.90
Teensy 3.6	W5200	WIZ820io	96.65	1157.56
Teensy 3.6	W5100	WIZ811MJ	9.61	10.16
Teensy 3.2	W5200	WIZ820io	96.56	1030.55
Teensy LC	W5500	WIZ850io	97.51	390.46
Teensy 2.0	W5100	WIZ811MJ	9.75	10.16
Arduino Uno R3	W5500	Seeed Ethernet	96.47	284.42
Arduino Uno R3	W5100	Arduino Ethernet R3	9.66	10.17
Arduino Uno R3	W5100	Ethernet R2 (clone)	9.65	10.17
Arduino Due	W5100	Arduino Ethernet R3	9.72	10.16
Arduino Due	W5500	Seeed Ethernet	96.42	378.85
Arduino Zero	W5500	Seeed Ethernet	96.33	234.03
Arduino 101	W5500	Seeed Ethernet	fail	fail
ChipKit Uno32	W5500	Seeed Ethernet	fail	fail
Wemos D1 (ESP8266)	W5500	Seeed Ethernet	fail	fail
Mega 2560 (clone)	W5500	Seeed Ethernet	fail	fail
Mega 2560 (clone)	W5100	Ethernet R2 (clone)	fail	fail

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