feat: allow filter object fields inside an array

[0x0a0d]

use .$. to deeply filter fields in array elements
please look at test

cars.$.wheels.$.histories.$.date is used to get date property of histories, which is an array property of wheels - which, again, is an array property of cars

[icebob]

Please make and publish a benchmark test between the master and in your PR branch to see how this new get logic affects the performance.

[0x0a0d]

@icebob could you give me instructions on how to create a benchmark?

[icebob]

I've created a benchmark in master branch what you can execute with npm run bench command.

[0x0a0d]

Thanks @icebob, here is bench in my pc

3.5 GHz Quad-Core Intel Core i7
16 GB 1600 MHz DDR3

Result files

master.log
pull-request.log

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Entity Creation

Master

• NeDB (file): 3,680 ops/sec
• SQLite (memory): 2,130 ops/sec
• Difference: NeDB is 42.12% faster than SQLite

Pull-request

• NeDB (file): 3,695 ops/sec (0.41% increase)
• SQLite (memory): 2,147 ops/sec (0.80% increase)
• Difference: NeDB is 41.9% faster than SQLite

---

Entity Finding

Master

• NeDB (file): 4,455 ops/sec
• SQLite (memory): 1,193 ops/sec
• Difference: NeDB is 73.21% faster than SQLite

Pull-request

• NeDB (file): 4,360 ops/sec (2.13% decrease)
• SQLite (memory): 1,225 ops/sec (2.68% increase)
• Difference: NeDB is 71.9% faster than SQLite

---

Entity Listing

Master

• NeDB (file): 1,390 ops/sec
• SQLite (memory): 910 ops/sec
• Difference: NeDB is 34.53% faster than SQLite

Pull-request

• NeDB (file): 1,355 ops/sec (2.52% decrease)
• SQLite (memory): 881 ops/sec (3.18% decrease)
• Difference: NeDB is 34.98% faster than SQLite

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Entity Counting

Master

• NeDB (file): 1,969 ops/sec
• SQLite (memory): 2,791 ops/sec
• Difference: SQLite is 29.44% faster than NeDB

Pull-request

• NeDB (file): 1,755 ops/sec (10.86% decrease)
• SQLite (memory): 2,712 ops/sec (2.83% decrease)
• Difference: SQLite is 35.29% faster than NeDB

---

Entity Getting

Master

• NeDB (file): 12,948 ops/sec
• SQLite (memory): 2,078 ops/sec
• Difference: NeDB is 83.95% faster than SQLite

Pull-request

• NeDB (file): 13,111 ops/sec (1.26% increase)
• SQLite (memory): 2,119 ops/sec (1.97% increase)
• Difference: NeDB is 83.84% faster than SQLite

---

Entity Updating

Master

• NeDB (file): 2,984 ops/sec
• SQLite (memory): 1,254 ops/sec
• Difference: NeDB is 57.96% faster than SQLite

Pull-request

• NeDB (file): 3,685 ops/sec (23.51% increase)
• SQLite (memory): 1,398 ops/sec (11.48% increase)
• Difference: NeDB is 62.08% faster than SQLite

---

Entity Deleting

Master

NeDB (file): 21,769 ops/sec

• SQLite (memory): 2,693 ops/sec
• Difference: NeDB is 87.41% faster than SQLite

Pull-request

• NeDB (file): 24,163 ops/sec (11.01% increase)
• SQLite (memory): 5,826 ops/sec (116.29% increase)
• Difference: NeDB is 73.37% faster than SQLite

---

[icebob]

Great, thank you.