How to convert binary to string?

Question

PHP

There is data in the clickhouse that is stored in FixedString(6)
the string looks like this (&():
in theory, if I use bin2hex, then 6 bytes should turn into 12 bytes (hexadecimal)
but in fact all values ​​are different. Could be 6, 7 , 8, 10 and 12 bytes After all, the data is 6 bytes
What could be the reason for this?

Answer 1

Parsing is very easy to parallel, look for articles on Habré about pcntl, shmop

Answer 2

Because they have different hardware and loads, and data volumes.
Try adding the header "Accept-Encoding: gzip" - perhaps compressed data transfer is available.
Unpacking the result:
if xml parsing is not regexp, but through simplexml, then it is better to set options - LIBXML_COMPACT | LIBXML_NONET | LIBXML_NOCDATA