fafcc94398 Make bitcoin-util grind_task tsan friendly (MacroFake)
Pull request description:
While there is no issue with the current code, `libtsan-12.2.1` on my machine does not seem to like it. This is understandable, because the nonce isn't protected by a mutex that the sanitizer can see (only by an atomic, which achieves the same).
Fix this by guarding the nonce by the existing atomic bool, which tsan seems to understand.
ACKs for top commit:
ajtowns:
ACK fafcc94398
hebasto:
ACK fafcc94398, I have reviewed the code and it looks OK, I agree it can be merged. Confirming that initial bug has been fixed.
Tree-SHA512: 4e67fab5833ec7d91678b85a300368892ee9f7cd89a52cc5e15a7df65b2da813b24eaffd8362d0d8a3c8951e024041d69ebddf25101b11d0a1a62c1208ddc9a5
564b580bf0 test: Introduce MIN_BLOCKS_TO_KEEP constant (Aurèle Oulès)
71d9a7c03b test: Wallet imports on pruned nodes (Aurèle Oulès)
e6906fcf9e rpc: Enable wallet import on pruned nodes (Aurèle Oulès)
Pull request description:
Reopens#16037
I have rebased the PR, addressed the comments of the original PR and added a functional test.
> Before this change importwallet fails if any block is pruned. This PR makes it possible to importwallet if all required blocks aren't pruned. This is possible because the dump format includes key timestamps.
For reviewers:
`python test/functional/wallet_pruning.py --nocleanup` will generate a large blockchain (~700MB) that can be used to manually test wallet imports on a pruned node. Node0 is not pruned, while node1 is.
ACKs for top commit:
kouloumos:
ACK 564b580bf0
achow101:
reACK 564b580bf0
furszy:
ACK 564b580
w0xlt:
ACK 564b580bf0
Tree-SHA512: b345a6c455fcb6581cdaa5f7a55d79e763a55cb08c81d66be5b12794985d79cd51b9b39bdcd0f7ba0a2a2643e9b2ddc49310ff03d16b430df2f74e990800eabf
a2724808ab doc: add 23.1 release notes (fanquake)
Pull request description:
Same as past releases / https://github.com/bitcoin/bitcoin/pull/26524 etc.
ACKs for top commit:
stickies-v:
ACK a2724808ab
Tree-SHA512: e9f7ad72c23c8621e8a98ffa0dc0d08ebe30ad0bc8d23e25fabda5b1a9318ff74c65344821267c6af5a8d94c26c775ce83a67cbe0c4922eac07a4319fd94eb49
062e4e9fe9 doc: add 22.1 release notes (fanquake)
Pull request description:
Same as past releases / #26524 etc.
Top commit has no ACKs.
Tree-SHA512: e41b1eaff1aacd89260f070650044629de5673020e0e70bdceb0749981403aad380e5595c494fa5ebaaa7c87e0ebea0def5f5bbd433a4b3b810e40c2de6dc448
fa34e5f3d3 test: Avoid intermittent timeout in feature_assumevalid.py (MarcoFalke)
Pull request description:
Currently the test will spin up p2p connections in the beginning, then announce the headers to all nodes, but only send the blocks sequentially. This takes a long time, so when getting to the last node, it will have already timed out, while node1 is busy eating blocks. Example:
```
node2 2022-12-06T19:31:35.419291Z [msghand] [net_processing.cpp:5783] [SendMessages] [net] Requesting block 2cfdb317b3b901f79e2d4f96339d0c0dffd8ef2685d324f62ab0e2fa3402430e (1) peer=0
node2 2022-12-06T19:31:35.424784Z [msghand] [net.cpp:2776] [PushMessage] [net] sending getdata (577 bytes) peer=0
[...]
node2 2022-12-06T19:41:35.423257Z [msghand] [net_processing.cpp:5729] [SendMessages] Timeout downloading block 2cfdb317b3b901f79e2d4f96339d0c0dffd8ef2685d324f62ab0e2fa3402430e from peer=0, disconnecting
node1 2022-12-06T19:41:35.438706Z [msghand] [net_processing.cpp:5783] [SendMessages] [net] Requesting block 6575919043306ed309014d0bd79814b4fab8afaa281e026d8cc3a1c4c2336fbc (1748) peer=0
node2 2022-12-06T19:41:35.521253Z [net] [net.cpp:573] [CloseSocketDisconnect] [net] disconnecting peer=0
node2 2022-12-06T19:41:35.630417Z [net] [net_processing.cpp:1532] [FinalizeNode] [net] Cleared nodestate for peer=0
```
Fix this by only spinning up the p2p connection right before they are needed.
ACKs for top commit:
jamesob:
ACK fa34e5f3d3 ([`jamesob/ackr/26651.1.MarcoFalke.test_avoid_intermittent`](https://github.com/jamesob/bitcoin/tree/ackr/26651.1.MarcoFalke.test_avoid_intermittent))
Tree-SHA512: 7a1b114c07dfa30237c8cd8637dd6646c5c2dc2530c9de61db231738fddc800b620c31dc664237e33d35e951cf161f015fda593162efc9d85c5f68c6e37217d4
89c1491d35 wallet: if only have one output type, don't perform "mixed" coin selection (furszy)
Pull request description:
For wallets that only have one output type, we are currently performing the same
selection process over the same coins twice.
The "mixed coin selection" doesn't add any value to the result
(there is nothing to mix if the available coins struct has only one type).
ACKs for top commit:
achow101:
ACK 89c1491d35
john-moffett:
ACK 89c1491d35
kristapsk:
cr utACK 89c1491d35
Tree-SHA512: 672eaeed3ba911d13fa61a46f719c8fe1ebe4d2dc7d723040e71937c693659411bc99cdbd9f0014e836b70eebeff1b8ca861f4d81d39e6f79f437364a526edbe
bcb7123406 test: add add_wallet_options to TestShell (josibake)
Pull request description:
following 555519d082, `TestShell` now always runs with `-disablewallet`. simple fix is to add `add_wallet_options` to `add_options`; looks like testshell was overlooked when adding in the `add_wallet_options` call to the functional tests in #26480
ACKs for top commit:
amitiuttarwar:
ACK bcb7123406
Tree-SHA512: db554a8b3c8ff5bd10cab9592b316035a92f86a0a0ae8ff914de9687bbbb6fc2235bdf82c4cd40e4071782f8b6edf91aad372e82ed3b826c9d8ae39dbe3dbf57
e75d227632 Minor fix: Don't directly delete abandoned txes (John Moffett)
Pull request description:
This fully closesbitcoin/bitcoin#12179. Currently, when a user abandons a transaction by clicking "Abandon Transaction" in the context menu, a call is made to remove it from the GUI view:
`model->getTransactionTableModel()->updateTransaction(hashQStr, CT_UPDATED, false);`
(The `false` parameter is for `bool showTransaction`)
This behavior is probably unwanted, as the transaction is not actually removed from the wallet and would show up again if the node is restarted.
However, the previous line, `model->wallet().abandonTransaction(hash);`, changes the underlying model and calls `NotifyTransactionChanged(wtx.GetHash(), CT_UPDATED);`, which queues a signal that eventually calls back to `updateTransaction`, this time with `showTransaction` set to `true`. This runs on a separate thread, so it gets called *after* the 'subsequent' `updateTransaction`. The transaction gets removed from the GUI and immediately added back.
In a nutshell, `updateTransaction` gets called twice. The first (direct) call deletes the transaction from the GUI. The second (sent via a queued signal) brings it back to the GUI. The first direct call is redundant and unwanted. Worse, if the `abandonTransaction` call fails for any reason, the transaction still gets removed from the GUI. (This is what caused bitcoin#12179. It can still be triggered if, eg., a user clicks "Abandon Transaction" the moment after a new block is found.)
There are no conditions (to my knowledge) where an abandoned transaction should be directly removed from the GUI. If the underlying model changes, the deletion should be reflected anyway by the queued signal to `updateTransaction`.
The behavior is borne out by the QT logs. To reproduce, send a transaction with RBF enabled, then bump the fee, then 'abandon transaction' on the first transaction. The logs will show something like this:
```
2022-11-28T14:48:00Z [qt] GUI: "NotifyTransactionChanged: 2c5811484f1adec92a739a5e70b453b03eaed0f7cc0538fbd0ee1589e586b951 status= 1"
2022-11-28T14:48:00Z [qt] GUI: "TransactionTablePriv::updateWallet: 2c5811484f1adec92a739a5e70b453b03eaed0f7cc0538fbd0ee1589e586b951 1"
2022-11-28T14:48:00Z [qt] GUI: " inModel=1 Index=381-382 showTransaction=0 derivedStatus=2"
2022-11-28T14:48:00Z [qt] GUI: "TransactionTablePriv::updateWallet: 2c5811484f1adec92a739a5e70b453b03eaed0f7cc0538fbd0ee1589e586b951 1"
2022-11-28T14:48:00Z [qt] GUI: " inModel=0 Index=381-381 showTransaction=1 derivedStatus=0"
```
Notice the duplicate `updateWallet` calls with different `showTransaction` values.
ACKs for top commit:
hebasto:
ACK e75d227632
jarolrod:
tACK e75d227632
Tree-SHA512: 00f150f747c2ee1605af861a21d5c3b9773a4a9985e8dab62e48bd32885b1bfa4e8cbf805ad61af77aec9d3ccefaed3f4311a29086aa8c22d55d5326ba68ece6
798430d127 wallet: Sanity check fee paid cannot be negative (Andrew Chow)
c1a84f108e wallet: Move fee underpayment check to after fee setting (Andrew Chow)
e5daf976d5 wallet: Rename nFeeRet in CreateTransactionInternal to current_fee (Andrew Chow)
Pull request description:
Currently the fee underpayment check occurs right after we calculate what the transaction's fee should be. However the fee paid by the transaction at that time does not always match. Notably, when doing SFFO, the fee paid at that time will almost always be less than the fee required, which then required having a bypass of the underpayment check that results in SFFO payments going through when they should not.
This PR moves the underpayment check to after fees have been finalized so that we always check whether the fee is being underpaid. This removes the exception for SFFO and unifies this behavior for both SFFO and non-SFFO txs.
ACKs for top commit:
S3RK:
Code review ACK 798430d127
furszy:
Code review ACK 798430d
glozow:
utACK 798430d127, code looks correct to me
Tree-SHA512: 720e8a3dbdc9937b12ee7881eb2ad58332c9584520da87ef3080e6f9d6220ce8d3bd8b9317b4877e56a229113437340852976db8f64df0d5cc50723fa04b02f0
8c3ff7d52a test: Suggested cleanups for rpc_namedparams test (Ryan Ofsky)
d1ca563825 bitcoin-cli: Make it an error to specify the "args" parameter two different ways (Ryan Ofsky)
6bd1d20b8c rpc: Make it an error server-side to specify same named parameter multiple times (Ryan Ofsky)
e2c3b18e67 test: Add RPC tests for same named parameter specified more than once (Ryan Ofsky)
Pull request description:
Make the JSON-RPC server reject requests with the same named parameter specified multiple times, instead of silently overwriting earlier parameter values with later ones.
Generally JSON keys are supposed to unique, and their order isn't supposed to be significant, so having the server silently discard duplicate keys is error-prone. Most likely if an RPC client is sending a request with duplicate keys it means something is wrong with the request and there should be an error.
After this change, named parameters are still allowed to specified multiple times on the `bitcoin-cli` command line, since `bitcoin-cli` automatically replaces earlier values with later values before sending the JSON-RPC request. This makes sense, since it's not unusual for the order of command line options to be significant or for later command line options to override earlier ones.
ACKs for top commit:
MarcoFalke:
review ACK 8c3ff7d52a 🗂
kristapsk:
ACK 8c3ff7d52a
stickies-v:
ACK 8c3ff7d52
Tree-SHA512: 2d1357dcc2c171da287aeefc7b333ba4e67babfb64fc14d7fa0940256e18010a2a65054f3bf7fa1571b144d2de8b82d53076111b5f97ba29320cfe84b6ed986f
956c67059c refactor, doc: Improve SetupAddressRelay call in version processing (Martin Zumsande)
3c43d9db1e p2p: Don't self-advertise during VERSION processing (Gleb Naumenko)
Pull request description:
This picks up the last commit from #19843.
Previously, we would prepare to self-announce to a new peer while parsing a `version` message from that peer.
This is redundant, because we do something very similar in `MaybeSendAddr()`, which is called from `SendMessages()` after
the version handshake is finished.
There are a couple of differences:
1) `MaybeSendAddr()` self-advertises to all peers we do address relay with, not just outbound ones.
2) `GetLocalAddrForPeer()` called from `MaybeSendAddr()` makes a probabilistic decision to either advertise what they think we are or what we think we are, while `PushAddress()` on `version` deterministically only does the former if the address from the latter is unroutable.
3) During `version` processing, we haven't received a potential sendaddrv2 message from our peer yet, so self-advertisements with addresses from addrV2-only networks would always be dropped in `PushAddress()`.
Since it's confusing to have two slightly different mechanisms for self-advertising, and the one in `MaybeSendAddr()` is better, remove the one in `version`.
ACKs for top commit:
stratospher:
ACK 956c670
naumenkogs:
ACK 956c67059c
amitiuttarwar:
reACK 956c67059c
Tree-SHA512: 933d40615289f055c022170dde7bad0ac0a1d4be377538bfe9ba64375cfeb03bcd803901591f0739ac4850c880e8475a68fd1ab0330800030ab7f19e38c00274
8f5c560e11 refactor: Refactored RequestMethodString function to follow developer notes (JoaoAJMatos)
7fd3b9491b refactor: Deleted unreachable code in httpserver.cpp (JoaoAJMatos)
Pull request description:
Some of the code in httpserver.cpp was unreachable, and didn't follow the developer notes.
Continuation of [#26570 ](https://github.com/bitcoin/bitcoin/pull/26570)
ACKs for top commit:
stickies-v:
re-ACK [8f5c560](8f5c560e11)
Tree-SHA512: ba8cf4c6dde9e2bb0ca9d63a0de86dfa37b070803dde71ac8384c261045835697a2335652cf5894511b3af8fd99f30e1cbda4e4234815b8b39538ade90fab3f9
293849a260 univalue: Remove confusing getBool method (Ryan Ofsky)
Pull request description:
Drop `UniValue::getBool` method because it is easy to confuse with the `UniValue::get_bool` method, and could potentially cause bugs. Unlike `get_bool`, `getBool` doesn't ensure that the value is a boolean and returns false for all integer, string, array, and object values instead of throwing an exception.
The `getBool` method is also redundant because it is an alias for `isTrue`. There were only 5 `getBool()` calls in the codebase, so this commit replaces them with `isTrue()` or `get_bool()` calls as appropriate.
These changes were originally made by MarcoFalke in https://github.com/bitcoin/bitcoin/pull/26213 but were dropped to limit the scope of that PR.
ACKs for top commit:
justinpickering:
ACK 293849a260
sipa:
utACK 293849a260
w0xlt:
ACK 293849a260
hebasto:
ACK 293849a260, also verified that the removed `getBool` method is not mentioned in any docs:
furszy:
ACK 293849a2
Tree-SHA512: 9fbfe5e2083410f123b18703a0cc0161ecbbb4958f331c9ff808dcfcc6ad499b0e896abd16fb8ea200c53ba29878db9812ce141e59cc5e0fd174741b0bcb192d
We need to check that the fee is not negative even before it is
finalized. The setting of fees for SFFO may adjust the fee to be
"correct" and no longer negative, but erroneously reduce the amounts too
far. So we need to check this condition before we do those adjustments.
It doesn't make sense to be checking whether the fee paid is underpaying
before we've finished setting the fees. So do that after we have done
the reduction for SFFO and change adjustment for fee overpayment.
fa7d71accc test: Move rpc_fundrawtransaction.py to wallet_fundrawtransaction.py (MarcoFalke)
fa933d6985 test: Move feature_backwards_compatibility.py to wallet_backwards_compatibility.py (MarcoFalke)
Pull request description:
The tests only tests the wallet and it doesn't make sense to extend it for other stuff, so clarify that.
ACKs for top commit:
fanquake:
ACK fa7d71accc
pablomartin4btc:
re-ACK fa7d71accc
Tree-SHA512: 9dc131ed8ff119bd6d43d04ecc5c96d02f2d6fdc3d0805492774a414c0fbe6a984da7631154122a080c54ddd25fc5a5bdd52b282c918fce4932057ba72c2bf71
Replacing `install` with `install-lib` and `install-bin` is not strictly
necessary just to update the library, but it takes advantage of recent
changes in the new version, and makes the build more minimal.
Drop UniValue::getBool method because it is easy to confuse with the
UniValue::get_bool method, and could potentially cause bugs. Unlike get_bool,
getBool doesn't ensure that the value is a boolean and returns false for all
integer, string, array, and object values instead of throwing an exceptions.
The getBool method is also redundant because it is an alias for isTrue. There
were only 5 getBool() calls in the codebase, so this commit replaces them with
isTrue() or get_bool() calls as appropriate.
These changes were originally made by MarcoFalke in
https://github.com/bitcoin/bitcoin/pull/26213 but were dropped to limit the
scope of that PR.
Co-authored-by: MarcoFalke <*~=`'#}+{/-|&$^_@721217.xyz>
fabb24cbef test: Use last release in compatibility tests (MarcoFalke)
Pull request description:
In compatibility tests it makes sense to always use the last release without the new feature, as it is likely more in use than any even older previous release.
ACKs for top commit:
Sjors:
utACK fabb24c
Tree-SHA512: beb854f4d28ba313282e1e0303abb0e09377828b138bde5a3e209337210b6b4c24855ab90a68f8789387001e4ca33b15cc37dbc9b7809929f4e7d1b69833a527
affbf58a1e build: Move environment variables into `$(package)_config_env` (Hennadii Stepanov)
d44fcd3c97 build: Make $(package)_*_env available to all $(package)_*_cmds (Hennadii Stepanov)
Pull request description:
On master (1e7564eca8) the depends build system, which is based on pure GNU Make, works, but it lacks robustness, and in some corner cases it fails. For example, see bitcoin/bitcoin#22552.
Another [bug](https://github.com/bitcoin/bitcoin/issues/22719) in the depends build system has already become a problem at least two times in the past (https://github.com/bitcoin/bitcoin/pull/16883#issuecomment-683817472 and https://github.com/bitcoin/bitcoin/pull/24134). Each time the problem was solved with other means.
The initial [solution](https://github.com/bitcoin/bitcoin/pull/19882) had some discussion. Also it was discussed on the IRC meeting in #bitcoin-core-builds channel. This PR, actually, is a resurrection of it, as the bug silently struck pretty [recently](https://github.com/bitcoin/bitcoin/pull/24134).
The bug is well described in bitcoin/bitcoin#22719.
Here is another, a bit simpler description, which requires only basic shell (bash, dash etc) experience.
After creating targets by this code:1e7564eca8/depends/funcs.mk (L280) a "draft" line of recipe like `$($(1)_config_env) $(call $(1)_config_cmds, $(1))` becomes a shell command sequence `VAR1=foo VAR2=bar command1 && command2` which is supposed to be executed in a [new sub-shell](https://www.gnu.org/software/make/manual/html_node/Execution.html#Execution).
Please note that `VAR1=foo VAR2=bar` part is visible for the first `command1` only (for details see shell docs). Example:
```sh
$ VAR1="foo" VAR2="bar" echo "begin" && printenv VAR1 && printenv VAR2 && echo "end"
begin
$ echo $?
1
```
Using the `export` command is a trivial solution:
```sh
$ export VAR1="foo" VAR2="bar"; echo "begin" && printenv VAR1 && printenv VAR2 && echo "end"
begin
foo
bar
end
$ echo $?
0
```
As a [new sub-shell](https://www.gnu.org/software/make/manual/html_node/Execution.html#Execution) is invoked for each line of the recipe, there are no side effects of using `export`. It means this solution should not be considered invasive.
Fixesbitcoin/bitcoin#22719.
---
Also this PR removes no longer needed crutch from `qt.mk`.
ACKs for top commit:
fanquake:
ACK affbf58a1e
Tree-SHA512: 0ce2cf82870a7774bdf1592fac50857126ae47da902e349f1092d50109223be9d6a8efd5e92ec08c2ca775b17516482aabaf232378950ade36484a883acc177b
fa579f3063 refactor: Pass reference to last header, not pointer (MacroFake)
Pull request description:
It is never a nullptr, otherwise an assertion would fire in UpdatePeerStateForReceivedHeaders.
Passing a reference makes the code easier to read and less brittle.
ACKs for top commit:
john-moffett:
ACK fa579f3
aureleoules:
ACK fa579f3063
Tree-SHA512: 9725195663a31df57ae46bb7b11211cc4963a8f3d100f60332bfd4a3f3327a73ac978b3172e3007793cfc508dfc7c3a81aab57a275a6963a5ab662ce85743fd0
07dfbb5bb8 Make static nLastFlush and nLastWrite Chainstate members (Aurèle Oulès)
Pull request description:
Fixes#22189.
The `static std::multimap<uint256, FlatFilePos> mapBlocksUnknownParent; ` referenced in the issue was already fixed by #25571. I don't believe Chainstate references any other static variables.
ACKs for top commit:
jamesob:
ACK 07dfbb5bb8 ([`jamesob/ackr/26513.1.aureleoules.make_static_nlastflush_a`](https://github.com/jamesob/bitcoin/tree/ackr/26513.1.aureleoules.make_static_nlastflush_a))
theStack:
Concept and code-review ACK 07dfbb5bb8
Tree-SHA512: 0f26463c079bbc5e0e62707d4ca4c8c9bbb99edfa3391d48d4915d24e2a1190873ecd4f9f11da25b44527671cdc82c41fd8234d56a4592a246989448d34406b0
d7f61e7d59 rpc: reduce LOCK(cs_main) scope in gettxoutproof (Andrew Toth)
4d92b5aaba rpc: reduce LOCK(cs_main) scope in GetUndoChecked and getblockstats (Andrew Toth)
efd82aec8a rpc: reduce LOCK(cs_main) scope in blockToJSON (Andrew Toth)
f00808e932 rpc: reduce LOCK(cs_main) scope in GetBlockChecked and getblock (Andrew Toth)
7d253c943f zmq: remove LOCK(cs_main) from NotifyBlock (Andrew Toth)
c75e3d2772 rest: reduce LOCK(cs_main) scope in rest_block (Andrew Toth)
Pull request description:
Picking up from #21006.
After commit ccd8ef65f9 it is no longer required to hold `cs_main` when calling `ReadBlockFromDisk`. This can be verified in `master` at https://github.com/bitcoin/bitcoin/blob/master/src/node/blockstorage.cpp#L755. Same can be seen for `UndoReadFromDisk` https://github.com/bitcoin/bitcoin/blob/master/src/node/blockstorage.cpp#L485.
The first commit moves `ReadBlockFromDisk` outside the lock scope in `rest_block`, where we can see a huge performance improvement when fetching blocks with multiple threads.
My test setup, on an Intel i7 with 8 cores (16 threads):
1. Start a fully synced bitcoind, with this `bitcoin.conf`:
```
rest=1
rpcthreads=16
rpcworkqueue=64
rpcuser=user
rpcpassword=password
```
2. Run ApacheBench: 10000 requests, 16 parallel threads, fetching block nr. 750000 in binary:
```
ab -n 10000 -c 16 "http://127.0.0.1:8332/rest/block/0000000000000000000592a974b1b9f087cb77628bb4a097d5c2c11b3476a58e.bin"
```
Time per request (mean)
183 ms on master
30 ms this branch
So this can process 6.1 times as many requests, and saturates all the cores instead of keeping them partly idle waiting in the lock. With 8 threads the mean times were 90 ms on master and 19 ms on this branch, a speedup of 4.7x.
Big thanks to martinus for finding this and the original PR.
The second commit is from a suggestion on the original PR by jonatack to remove the unnecessary `LOCK(cs_main)` in the zmq notifier's `NotifyBlock`.
I also found that this approach could be applied to rpcs `getblock` (including `verbosity=3`), `getblockstats`, and `gettxoutproof` with similar very good results. The above benchmarks steps need to be modified slightly for RPC. Run the following ApacheBench command with different request data in a file named `data.json`:
```
ab -p data.json -n 10000 -c 16 -A user:password "http://127.0.0.1:8332/"
```
For `getblock`, use the following in `data.json`:
```
{"jsonrpc": "1.0", "id": "curltest", "method": "getblock", "params": ["0000000000000000000592a974b1b9f087cb77628bb4a097d5c2c11b3476a58e"]}
```
master - 184 ms mean request time
branch - 28 ms mean request time
For `getblock` with verbosity level 3, use the following in `data.json`:
```
{"jsonrpc": "1.0", "id": "curltest", "method": "getblock", "params": ["0000000000000000000592a974b1b9f087cb77628bb4a097d5c2c11b3476a58e", 3]}
```
This verbosity level fetches an undo file from disk, so it benefits from this approach as well. However, a lot of time is spent serializing to JSON so the performance gain is not as severe.
master - 818 ms mean request time
branch - 505 ms mean request time
For `getblockstats`, use the following in `data.json`:
```
{"jsonrpc": "1.0", "id": "curltest", "method": "getblockstats", "params": ["0000000000000000000592a974b1b9f087cb77628bb4a097d5c2c11b3476a58e", ["minfeerate","avgfeerate"]]}
```
This request used a lock on reading both a block and undo file, so the results are very good.
master - 244 ms mean request time
branch - 28 ms mean request time
ACKs for top commit:
MarcoFalke:
re-ACK d7f61e7d59💫
hebasto:
ACK d7f61e7d59, I have reviewed the code and it looks OK. Did not make benchmarking though.
Tree-SHA512: 305ac945b4571c5f47646d4f0e78180d7a3d40b2f70ee43e4b3e00c96a465f6d0b9c750b8e85c89ed833e557e2cdb5896743f07ef90e4e53d4ad85452b545886
