doc: add historical 0.19.0 release notes #17422
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ACK fec230e $ diff -du ../bitcoin-0.19/doc/release-notes.md doc/release-notes/release-notes-0.19.0.md
--- ../bitcoin-0.19/doc/release-notes.md 2019-11-08 21:11:14.775014215 +0100
+++ doc/release-notes/release-notes-0.19.0.md 2019-11-08 23:15:15.866763153 +0100
@@ -1,6 +1,3 @@
-0.19.0 Release Notes
-====================
-
Bitcoin Core version 0.19.0 is now available from:
<https://bitcoincore.org/bin/bitcoin-core-0.19.0/>Then again, the "0.19.0 Release Notes" at the beginning is inconsistent with any other release notes in the archive so that's fine with me. |
Yep, I'd removed that as it wasn't present in any of the other historical notes. |
deadalnix
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Summary: 67d99900b0d770038c9c5708553143137b124a6c make SaltedOutpointHasher noexcept (Martin Ankerl) Pull request description: If the hash is not `noexcept`, `unorderd_map` has to assume that it can throw an exception. Thus when rehashing care needs to be taken. libstdc++ solves this by simply caching the hash value, which increases memory of each node by 8 bytes. Adding `noexcept` prevents this caching. In my experiments with `-reindex-chainstate -stopatheight=594000`, memory usage (maximum resident set size) has decreased by 9.4% while runtime has increased by 1.6% due to additional hashing. Additionally, memusage::DynamicUsage() is now more accurate and does not underestimate. | | runtime h:mm:ss | max RSS kbyte | |---------------------------------------|-----------------|--------------| | master | 4:13:59 | 7696728 | | 2019-09-SaltedOutpointHasher-noexcept | 4:18:11 | 6971412 | | change | +1.65% | -9,42% | Comparison of progress masters vs. 2019-09-SaltedOutpointHasher-noexcept  Backport of Core [[bitcoin/bitcoin#16957 | PR16957]] Release notes were backported from Core [[bitcoin/bitcoin#17422 | PR17422]] Test Plan: `ninja check check-functional` for sanity Reviewers: #bitcoin_abc, deadalnix Reviewed By: #bitcoin_abc, deadalnix Differential Revision: https://reviews.bitcoinabc.org/D7996
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