DecimalArray Benchmarks

[tustvold]

Is your feature request related to a problem or challenge? Please describe what you are trying to do.

We lack any benchmark coverage of DecimalArray and DecimalBuilder

Describe the solution you'd like

Some basic benchmarks of constructing, iterating and filtering decimal arrays

Describe alternatives you've considered

Additional context

Perhaps @liukun4515 you might want to pick this up in advance of making any changes?

[alamb]

There are some benchmarks in #2360 -- see #2360 (comment) from @liukun4515

[liukun4515]

pick up this issue. thanks @tustvold @alamb

[liukun4515]

we have many cases using the decimal data type, the benchmark and improvement for decimal are important for us.

[liukun4515]

I have added the benchmark for validation decimalarray for decimal128 and decimal256 in #2360.

In the pr #2360, I doesn't refactor the validation of decimal128 because I got wired benchmark result.

After the pr merge, I will submit a new pr or issue to discuss this.
@alamb @tustvold

[liukun4515]

• add test for decimal decoder from primitive reader: Add test for converting Decimal data stored as binary in parquet to arrow #2408
• (parquet)add benchmark for reading primitive data to decimal decimal benchmark: arrow reader decimal from parquet int32 and int64 #2438
• (parquet)add benchmark for reading fixed length byte array and byte array to decimal add bench: decimal with byte array and fixed length byte array #2529
• decimal benchmark: builder and vec to array benchmark: decimal builder and vec to decimal array #2450
• collation the validate decimal array validate Collocate Decimal Array Validation Logic #2446
• Benchmark of casting decimal arrays #2424

writer benchmark for decimal

• write decimal using primitive data type: int32, int64
• write decimal using bytes data: byte_array, fixed_length_byte_array

[liukun4515]

The performance of reading decimal data from bytes or fixed length bytes improves by #2528 #2522

[alamb]

🎉

[tustvold]

Closing as we have fairly good benchmark coverage now, and decimal array is now a primitive array yielding additional coverage