Ethernet Speed, only 4.4Kb/s ?

With arduino ethernet with ethernet.h and spi.h I made a simple webpage with 2 temperature sensors and 1 light sensor. I save this information every 10 seconds in a SD file. When i read this file from a webpage i can only reach 4.4Kb/s and i can read only 64 Kb :frowning:

Someone can reach more ethernet speed?
Someone can read more than 64 Kb.

Thanks in advance

You are reading the SDcard a block at a time not a byte at a time?