In D55653#1273825, @kib wrote:

In D55653#1273824, @obiwac wrote:

In D55653#1273804, @kib wrote:

Why is this needed? Size is end-start.
Note that there are huge amount of scripts used by people who parse procstat vm output based on the text format, with the fixed assignment of the columns. The output layout for text is kind of ABI, due to this.

If you insist that it is must be added, it probably fine for structured output like json/xml, but even less useful because its parsing already requires some full language that can do end-start. For the text columnar format, the new column perhaps requires a new option to enable it.

In which case maybe we add size to the very end? this wasn't mentioned in the review description, but this is related to bug https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293416 for context

Note that the field in the last column, which contains the path, might be empty. This makes additions after it even worse than just breaking the layout as proposed in patch.

I do suggest to add an option to enable the size column.