I used your suggestion and pasted a snippet of the results below. Notice the difference between the first and last time, why do some have the same times? I looked at some of the events that had 0.000 for the duration and there was a noticeable difference in time.
Here's a request and response pair of timestamp from looking at the events from GUID 023b0868-8fff-4f52-8374-61a305f96ef4
Request = 2015-05-14 02:27:33,405 80361983ms
Response = 2015-05-14 02:27:33,810 80362388ms
RTG_GUID firstTime lastTime duration
| 021c4152-e86a-42d5-ad30-b0ace69ea807 | 1431597859.119 1431597860.070 0.951
| 023b0868-8fff-4f52-8374-61a305f96ef4 | 1431584853.405 1431584853.405 0.000
| 027e273f-3e7b-423e-833f-5062ddeafcae | 1431604857.327 1431604857.327 0.000
| 05ba2e35-0275-457a-93c6-cca482bc7c63 | 1431610171.550 1431610171.550 0.000
| 06f6b992-c42c-4409-9dd2-09ea62c99ebe | 1431581886.482 1431581886.841 0.359
| 0a3046db-42fb-4fdc-9845-374a9765b540 | 1431603377.069 1431603377.069 0.000
| 0a48e95c-6a4d-4b45-9334-6698d87f8d9e | 1431580396.203 1431580396.203 0.000
| 0a972800-4681-44e9-805c-915d5b5deeb0 | 1431590652.840 1431590653.339 0.499
| 0c279929-c087-4fce-a685-7a129af473fe | 1431591504.562 1431591504.562 0.000
| 1084be43-ec11-42fa-a240-0605c7921126 | 1431582171.221 1431582171.564 0.343
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