The decoder doesn't need to know the number of elements ahead of time, and writing a uint8_t marker at the end instead of a uint64_t at the start can save some bytes.
<rdar://problem/101015632>
rdar://100873493
Pull request: https://github.com/WebKit/WebKit/pull/5264
Committed 255452@main (09496e855222): <https://commits.webkit.org/255452@main> Reviewed commits have been landed. Closing PR #5264 and removing active labels.
Committed 252432.632@safari-7614-branch (81b6f2dd592c): <https://commits.webkit.org/252432.632@safari-7614-branch> Reviewed commits have been landed. Closing PR #154 and removing active labels.