Changes to reporting to inlcude epoch

[daveh86]

• Small additions to gitignore file
• Change outputs to use a stringbuilder

[daveh86]

Running the following, this is the output I get from STDOUT

------1490853901705------
After 10 seconds, 114309 new records inserted - collection has 5619967 in total
11212 inserts per second since last report 100.00 % in under 50 milliseconds
22400 keyqueries per second since last report 100.00 % in under 50 milliseconds
11106 updates per second since last report 100.00 % in under 50 milliseconds
0 rangequeries per second since last report 100.00 % in under 50 milliseconds

------1490853911705------
After 20 seconds, 249144 new records inserted - collection has 5754802 in total
13483 inserts per second since last report 100.00 % in under 50 milliseconds
27008 keyqueries per second since last report 100.00 % in under 50 milliseconds
13539 updates per second since last report 100.00 % in under 50 milliseconds
0 rangequeries per second since last report 100.00 % in under 50 milliseconds

------1490853921705------
After 30 seconds, 382958 new records inserted - collection has 5888616 in total
13381 inserts per second since last report 100.00 % in under 50 milliseconds
26766 keyqueries per second since last report 100.00 % in under 50 milliseconds
13326 updates per second since last report 100.00 % in under 50 milliseconds
0 rangequeries per second since last report 100.00 % in under 50 milliseconds

And the contents of the logfile is

system_clock,relative_clock,total_inserts,inserts,percent_inserts_fastop,keyqueries,percent_keyqueries_fastop,updates,percent_updates_fastop,rangequeries,percent_rangequeries_fastop
1490853901705,10,114309,11212,100.00,22400,100.00,11106,100.00,0,100
1490853911705,20,249144,13483,100.00,27008,100.00,13539,100.00,0,100
1490853921705,30,382958,13381,100.00,26766,100.00,13326,100.00,0,100
1490853931705,40,516237,13327,100.00,26673,100.00,13338,100.00,0,100
1490853941705,50,648669,13244,100.00,26627,100.00,13257,100.00,0,100

[johnlpage]

Not sure how to accept this as it includes a PR for the binaries that has conflicts.