How to disable assert when run unit test about snappy HOT 3 CLOSED

This has got nothing to do with the unit test; it's just warning you that 
you've compiled with suboptimal flags for speed. If you want to compile without 
assertions, defining NDEBUG is the standard way, e.g. CFLAGS="-O2 -DNDEBUG" 
CXXFLAGS="-O2 -DNDEBUG" ./configure. (This is not Snappy-specific; the same 
holds for assert() from the standard C library.)

Thanks for quickly response.

warning disappered. but I've another issue:

I test snappy-1.0.1 and lzo2.04 to compare with this result:
http://www.spinics.net/lists/linux-driver-devel/msg14417.html

but I got a very different result:
origin data total size: 1692240669 (1.7GB text)

snappy compressed time total:7441 ms
snappy decompressed time total:1620 ms
lzo compressed time total:8544 ms
lzo decompressed time total:4607 ms

I used snappy-java, also call lzo in Java.

UPDATED:
I changed compile options(provided in your answer)
Got a new result:

snappy compressed time total:3878ms
snappy decompressed time total:1589ms
lzo compressed time total:8471ms
lzo decompressed time total:4575ms

does that ok as snappy test result.