Copying from stream - comparing different ways

There was a task from php: // input to copy the data into the desired file.
I decided to check for speed possible ways to copy a 9 megabyte file from php: // stdin.
There are several:

• Read blocks in fread () and write in fwrite ()
• Writing content using file_put_contents () data obtained with file_get_contents ()
• Copy using copy () file copy function
• Using stream_copy_to_stream (). appeared in php5

Fread / fwrite results:
Memory used: 9440 bytes.
Elapsed time: 0.09 seconds.

Results file_get_contents / file_put_contents:
Memory consumption: 940 bytes.
Time spent: 0.06 seconds;

Copy () results:
Memory used: 1008 bytes.
Time spent: 0.05 seconds;
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Results stream_copy_to_stream:
Memory used: 1240 bytes.
Time spent: 0.04 seconds;

What is the most interesting stream_copy_to_stream was faster copy (). If you take a regular file, NOT a stream, the results are likely to be in favor of copy ()

UPD: phpclub.ru/paste/index.php?show=1993 - test code

UPD 2: Tested on a file in 240MB. Everyone wins, except fread / fwrite (approximately 30 seconds versus 60).
So on large files it is not recommended to use it and file_get_contents due to the fact that you need the appropriate values ​​of memory_limit in php.ini.

As a result, I made it on stream_copy_to_stream.