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Anna Shaleva 9b841b9b8f core, rpc: use Seek to iterate over NEP* transfers 
The results are controversial a bit. MemoryPS is a special storage
and the new approach doesn't help it to iterate through NEP17 transfers.
However, on long distances (if transfers are requested for more than
1000 blocks, which is ~4.1 hours of mainnet chain) both LevelDB and
BoltDB perform good enough with the new approach. Taking into account
the fact that default value for the query period of `getnep17transfers`
RPC handler is a week (~40K mainnet blocks) we can sacrifice MemoryPS
performance in favour of BoltDB and LevelDB optimisation.

Close #2263.

Benchmark results:

name                                                                           old time/op    new time/op    delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           783µs ±13%    1762µs ± 4%  +125.12%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8         6.91ms ± 2%    9.00ms ± 2%   +30.28%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8        1.43ms ± 8%    1.79ms ± 4%   +24.93%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8       7.78ms ± 3%    8.93ms ± 2%   +14.78%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8       7.69ms ± 3%    1.73ms ±10%   -77.50%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8      14.1ms ± 2%     9.0ms ± 2%   -36.53%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          768µs ± 3%     801µs ± 2%    +4.24%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8        8.03ms ± 2%    8.05ms ± 8%      ~     (p=0.436 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8       1.70ms ±16%    0.85ms ± 7%   -49.85%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8      10.8ms ± 2%     8.1ms ± 2%   -25.21%  (p=0.000 n=10+8)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8      10.8ms ± 2%     0.9ms ± 7%   -92.12%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8     18.2ms ±13%     8.2ms ± 6%   -54.95%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         874µs ± 6%     823µs ± 2%    -5.81%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8       9.35ms ± 2%    8.14ms ± 2%   -12.91%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8      1.85ms ± 4%    0.89ms ±10%   -51.68%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8     10.6ms ± 4%     8.2ms ± 2%   -22.44%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8     10.7ms ± 2%     0.9ms ± 2%   -91.90%  (p=0.000 n=8+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8    21.8ms ±15%     8.2ms ± 1%   -62.25%  (p=0.000 n=10+10)

name                                                                           old alloc/op   new alloc/op   delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           650kB ± 0%    1010kB ± 7%   +55.45%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8         6.39MB ± 0%    9.89MB ± 1%   +54.74%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8        1.28MB ± 0%    1.14MB ± 0%   -11.25%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8       7.02MB ± 0%   10.01MB ± 0%   +42.54%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8       7.02MB ± 0%    1.08MB ± 0%   -84.64%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8      12.8MB ± 0%    10.0MB ± 0%   -22.04%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          823kB ± 3%     866kB ± 5%    +5.19%  (p=0.001 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8        9.92MB ± 0%    9.85MB ± 0%    -0.71%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8       1.84MB ± 4%    1.01MB ± 5%   -44.75%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8      11.0MB ± 0%    10.0MB ± 1%    -8.45%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8      11.0MB ± 0%     1.0MB ± 1%   -90.55%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8     20.0MB ± 0%    10.1MB ± 0%   -49.69%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         913kB ± 5%     907kB ± 6%      ~     (p=0.497 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8       10.0MB ± 1%    10.0MB ± 1%    -0.63%  (p=0.001 n=10+8)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8      1.92MB ± 2%    1.04MB ± 0%   -45.53%  (p=0.000 n=9+8)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8     11.1MB ± 1%    10.1MB ± 0%    -9.22%  (p=0.000 n=10+7)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8     11.1MB ± 1%     1.0MB ± 0%   -90.61%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8    20.4MB ± 1%    10.1MB ± 0%   -50.46%  (p=0.000 n=10+10)

name                                                                           old allocs/op  new allocs/op  delta
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take100Blocks-8           11.1k ± 0%     11.7k ± 0%    +5.35%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1_Take1000Blocks-8           110k ± 0%      110k ± 0%    +0.55%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take100Blocks-8         22.0k ± 0%     11.9k ± 0%   -46.14%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-100_Take1000Blocks-8         120k ± 0%      110k ± 0%    -8.44%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take100Blocks-8         120k ± 0%       12k ± 0%   -90.36%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/MemPS_StartFromBlockN-1000_Take1000Blocks-8        219k ± 0%      110k ± 0%   -49.73%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take100Blocks-8          11.3k ± 0%     11.2k ± 0%    -1.06%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1_Take1000Blocks-8          112k ± 0%      110k ± 0%    -2.36%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take100Blocks-8        22.5k ± 0%     11.3k ± 0%   -49.65%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-100_Take1000Blocks-8        124k ± 0%      110k ± 0%   -11.08%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take100Blocks-8        124k ± 0%       11k ± 0%   -90.84%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/BoltPS_StartFromBlockN-1000_Take1000Blocks-8       225k ± 0%      110k ± 0%   -51.07%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take100Blocks-8         11.4k ± 0%     11.3k ± 0%    -1.36%  (p=0.000 n=9+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1_Take1000Blocks-8         114k ± 0%      111k ± 0%    -2.33%  (p=0.000 n=10+9)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take100Blocks-8       22.7k ± 0%     11.5k ± 0%   -49.56%  (p=0.000 n=9+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-100_Take1000Blocks-8       125k ± 0%      111k ± 0%   -11.12%  (p=0.000 n=10+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take100Blocks-8       125k ± 0%       11k ± 0%   -90.82%  (p=0.000 n=8+10)
Blockchain_ForEachNEP17Transfer/LevelPS_StartFromBlockN-1000_Take1000Blocks-8      229k ± 1%      111k ± 0%   -51.42%  (p=0.000 n=10+10)
2022-01-19 20:55:08 +03:00
..
contract.go *: simplify some integer checks with IsUint64() 2021-07-19 15:42:42 +03:00
contract_test.go stackitem: introduce Convertible interface 2021-07-19 15:42:42 +03:00
deposit.go *: simplify some integer checks with IsUint64() 2021-07-19 15:42:42 +03:00
deposit_test.go stackitem: introduce Convertible interface 2021-07-19 15:42:42 +03:00
mpt_root.go state: fix MPTRoot JSONization 2021-03-26 13:45:18 +03:00
mpt_root_test.go state: fix MPTRoot JSONization 2021-03-26 13:45:18 +03:00
native_state.go *: use NEP-XX naming consistently in docs/comments 2021-11-19 12:58:46 +03:00
native_state_test.go state: optimize NEP17Balance deserialization 2021-08-09 11:09:49 +03:00
notification_event.go *: do not use WriteArray for frequently used items 2021-08-06 11:59:20 +03:00
notification_event_test.go *: do not use WriteArray for frequently used items 2021-08-06 11:59:20 +03:00
oracle.go stackitem: introduce Convertible interface 2021-07-19 15:42:42 +03:00
oracle_test.go stackitem: introduce Convertible interface 2021-07-19 15:42:42 +03:00
storage_item.go core: refactor callers of MemCachedStore.Seek 2021-10-21 10:05:12 +03:00
tokens.go core, rpc: use Seek to iterate over NEP* transfers 2022-01-19 20:55:08 +03:00
tokens_test.go state: prepare for NEP-11 data tracking, refactor/rename 2021-11-16 19:18:06 +03:00
validator.go core: switch to the new voting system (via native NEO contract) 2020-04-27 16:06:50 +03:00