可以手动拿到：
在这个方法里设个断点，在UI上点preview，断点触发后手动把_adstrace改成04，回车。
最后出来的PDF里trace data就存在PDF附件里
https://ldcis4e:50001/sap/bc/webdynpro/sf0a0001/benchmark?sap-language=EN
Click the icon below and you can get several useful trace data attached in the PDF. Actualy they will be required when you report some tickets to Adobe component, and the Adobe colleague will ask you to follow note 944221 to provide these trace data to them for analysis.
Please notice that:
the total time spent may vary due to the workload of ADS server.
If you render the same template twice, the second time may be shorter than the first because the first time when PDF is rendered, ADS will buffer its UUID and timestamp into cache to improve performance.