Capture only the files needed for the analysis (reactive capture)

Separate analyze and capture phase,i wonder to know how to reduce the capture phase time at iOS project ,i just want to analyze the changed files,but in capture phase Infer must run the translation file action,it translate the whole project files,can i just translate the changed files that i want to analyze?

below is what my command
step 1.
```
infer capture -- xcodebuild -workspace demo.xcworkspace -scheme Debug -sdk iphonesimulator10.1 -configuration Debug build
```
step 2.
```
infer --fail-on-issue -a infer --changed-files-index ./index.txt -- analyze
```
In step 1 waste about 25 mins translate about 1900 files. Assuming that I just modified a file, but wasted 25 minutes during the capture phase, this situation was obviously unreasonable.