When comparing Nirw Search vs The Platinum Searcher (pt), the Slant community recommends The Platinum Searcher (pt) for most people. In the question“What are the best open source tools for searching source code?” The Platinum Searcher (pt) is ranked 10th while Nirw Search is ranked 11th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros

Pro Progress Output
By default, display the file being searched.

Pro Optional multi-line support

Pro Color highlight matches

Pro Tab completion
The command-line for refining a search supports auto-completing based on the current output.

Pro Can refine the initial search
Initial search can be refined by typing in other terms (optionally exclude from results too).

Pro Optional regex or literal text searches
While regex is default, sometimes escaping is inconvenient, in these cases you can perform literal searches.
Pro Works with Atom
Pro Fully configurable
Can define specific configuration in each directory using .ptconfig.toml
.
Pro Golang
Writing fully in Go.
Pro Very fast
3–5× faster than ack. Slightly faster than ag.
Cons

Con Single threaded

Con Unable to update search result as you type
Con No package for standard Linux distribution
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