Update README.md

README.md

@@ -36,7 +36,7 @@ Just copy the files to your build tree and use a C++11 compiler
 Below are some [benchmarks](bench) comparing popular log libraries under Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz 
 
 #### Synchronous mode
-Time needed to log 1,000,000 lines under synchronous mode (the best of 3 runs):
+Time needed to log 1,000,000 lines under synchronous mode (in seconds, the best of 3 runs):
 
 |threads|boost log|glog   |easylogging |spdlog|
 |-------|:-------:|:-----:|----------:|------:|
@@ -46,7 +46,7 @@ Time needed to log 1,000,000 lines under synchronous mode (the best of 3 runs):
 
 
 #### Asynchronous mode 
-Time needed to log 1,000,000 lines under asynchronous mode, i.e. the time it takes to put them in the async queue (the best of 3 runs):
+Time needed to log 1,000,000 lines under asynchronous mode, i.e. the time it takes to put them in the async queue (in seconds, the best of 3 runs):
 
 |threads|g2log   |spdlog<sup>async mode</sup>|
 |:-------|:-----:|-------------------------:|