[pdal] Reading only specific fields from LAS files to improve performance.

[Jim Klassen]

On 3/22/21 8:46 AM, Andrew Bell wrote:
> If you're having performance issues with PDAL, I'd be interested to know what you're trying to do. Most of the time incurred when reading LAS data with PDAL is copying the data into memory. With LAZ, the decompression is quite expensive, as well and there's no getting around that.
>
While LAZ decompression is expensive, I have found that at least in some situations the extra CPU time needed for LAZ (de)compression is quicker overall than the extra I/O cost of LAS.