MongoDB shell version: 3.1.3-pre-
• Single mongod with wiredtiger as storage engine
• Windows 2012
• WriedTiger default configuration
• EC2 machine c3.4xlarge
• Used YCSB load
During insert only workload it's appear that high resolution counter which responsible to notify if operation take longer then X (100msec default) consume 60% of the CPU
The impact is so big that it mask the different between SSD drive to spin disk on windows.