Starting with Eclipse 4.24, Java debugging step-by-step has become slower.

eclipse 4.24 to eclipse 4.39，when debug java program, the step is slow, but eclipse 4.23 and before version’s step is fast. At first I thought it was a problem with JDT.However, after testing, it was found that the problem might be with the platform.

Here, "slow" means that after each step, the PC cursor disappears for a short period of time before updating to the next statement; "fast" means that after each step, the PC cursor updates very quickly, as if it had never disappeared.

Test Scenario：
windows + eclipse platform 4.39 + jdt 4.18（include in eclipse4.18） still slow.
linux + eclipse cdt , debug c program, step is fast.