The time in the benchmark output PDF file is incorrect.

[songant]

🐛 Describe the bug

For example, the benchmark test time is 14:50, but the time in the output PDF file is 14:48.

Steps to Reproduce

step 1：start benchmark test, time is 14:50:37 step 2: After the benchmark test is completed, view the PDF file. The starting time of the horizontal axis in the line chart in the PDF file is 14:48:32.

Expected behavior

The starting time of the horizontal axis in the line chart in the PDF file should be after 14:50:37.

Environment

version: v0.5.0

@happyandslow

[Jeffwan]

/cc @happyandslow can you help fix the issue?

[happyandslow]

@Jeffwan looking into it