Optimization: alloc_objects in sendtables2

[psavelis]

Describe the bug
Seems that readFields, qanglePreciseDecoder and noscaleDecoder (at sendtables2) are critical in the reading process and can be probably optimized.

In the Profiling below, we can see the object allocation for those methods:

To Reproduce
Run the parse exporting profiling data (ie.: to pyroscope or generating a flamegraph)

Expected behavior
A clear and concise description of what you expected to happen.

Library version
v5.2.1

Additional context

• Ran using on MacOS M1 16GB
• Used Pyroscope to browse and analyze the profiling metrics