String tables are compressed by the link-editor by removing duplicate entries and tail substrings. This compression can significantly reduce the size of any string tables. A compressed .dynstr table can produce a smaller text segment and hence reduce runtime paging activity. Because of these benefits, string table compression is enabled by default.
Linking objects that contribute a very large number of symbols may increase the link-edit time due to the string table compression. To avoid this cost during development use the link-editors -z nocompstrtab option. Any string table compression performed during a link-edit can be displayed using the link-editors debugging tokens -D strtab,detail.