SARIF File Merge Results in Much Bigger Merge File Than Combination of Originals

[davewichers]

I'm merging two SARIF files that are 225MB and 215MB respectively, but the resulting merge file that is generated is: 1,038MB, which doesn't make sense.

I believe the generated merge file is significantly restructuring the SARIF file, causing lots of unnecessary duplication of content. For example, I search for "results" blocks in the two original files and there are only 1 in each.

But there are 45 "results" blocks in the merged file, rather than simply 2 (or ideally 1).