Harshavardhana 3995355150
avoid repeated large allocations for large parts (#17968)
objects with 10,000 parts and many of them can
cause a large memory spike which can potentially
lead to OOM due to lack of GC.

with previous PR reducing the memory usage significantly
in #17963, this PR reduces this further by 80% under
repeated calls.

Scanner sub-system has no use for the slice of Parts(),
it is better left empty.

```
benchmark                            old ns/op     new ns/op     delta
BenchmarkToFileInfo/ToFileInfo-8     295658        188143        -36.36%

benchmark                            old allocs     new allocs     delta
BenchmarkToFileInfo/ToFileInfo-8     61             60             -1.64%

benchmark                            old bytes     new bytes     delta
BenchmarkToFileInfo/ToFileInfo-8     1097210       227255        -79.29%
```
2023-09-02 07:49:24 -07:00
..
2023-07-06 16:02:08 -07:00
2023-07-06 16:02:08 -07:00
2023-08-22 07:21:49 -07:00