One compact form of writing that attempts to fit the most information in as few words as possible is called telegram style (or telegraph style). it derives its name from the practice of limiting words in telegrams which were priced by the word.
The classic approach to this style eliminated articles, conjunctions and reduce sentences to one or two words, often omitting subjects as well. Telegraph style typically omits punctuation symbols (and actually uses the word STOP to stand for the period), so parenthetical reliance may be seen as inconsistent with this definition.
The article suggests related terms are cablese and telegraphese. The article also characterizes the brusque form as Hemingwayesque, but the text had better be pretty good before invoking a comparison to the author's punchy and transparent prose.