Suppress size performance #203
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Some folks like to use
erdtreeas anlsreplacement but becauseerdtreealways does a full-depth traversal when reading entries from either disk or cache it was quite slow to get the first depth level of directory entries even if directory size is suppressed.This PR makes it such that
$ erd --suppress-size --level 1only reads root's entries using only a single-thread (regardless of-T, --threads) so that results are available almost instantaneously.