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This step is implemented by ArchiveBuilder::gather_source_objs(), which iterates the metadata with ArchiveBuilder::iterate_sorted_roots(). All objects that are eligible for copying are entered (by reference) into ArchiveBuilder::_rw_src_objs or ArchiveBuilder::_rwro_src_objs, depending on whether they are read-write or read-only.
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Here are the elapsed time of the following test cases (which archive more than 20000 classes) using fastdebug build:
| LotsOfClasses.java | DynamicLotsOfClasses.java | |
|---|---|---|
| Old | 42.655 sec | 67.014 sec |
| New | 37.027 sec | 34.974 sec |
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