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Diffstat (limited to 'doc/release-notes.md')
| -rw-r--r-- | doc/release-notes.md | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/doc/release-notes.md b/doc/release-notes.md index 7d0d689684..cb3f7934ce 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -49,7 +49,7 @@ Low-level RPC changes than two arguments. Removal of Priority Estimation ------------------------------- +------------------------------- - Estimation of "priority" needed for a transaction to be included within a target number of blocks has been removed. The rpc calls are deprecated and will either @@ -71,6 +71,27 @@ P2P connection management - New connections to manually added peers are much faster. +Introduction of assumed-valid blocks +------------------------------------- + +- A significant portion of the initial block download time is spent verifying + scripts/signatures. Although the verification must pass to ensure the security + of the system, no other result from this verification is needed: If the node + knew the history of a given block were valid it could skip checking scripts + for its ancestors. + +- A new configuration option 'assumevalid' is provided to express this knowledge + to the software. Unlike the 'checkpoints' in the past this setting does not + force the use of a particular chain: chains that are consistent with it are + processed quicker, but other chains are still accepted if they'd otherwise + be chosen as best. Also unlike 'checkpoints' the user can configure which + block history is assumed true, this means that even outdated software can + sync more quickly if the setting is updated by the user. + +- Because the validity of a chain history is a simple objective fact it is much + easier to review this setting. As a result the software ships with a default + value adjusted to match the current chain shortly before release. The use + of this default value can be disabled by setting -assumevalid=0 0.14.0 Change log ================= |