.package(url: "https://github.com/sidepelican/gperftoolsSwift.git", from: "0.1.0"),

...

.executableTarget(
    dependencies: [
        ...
        "gperftoolsSwift",
    ]
),

import gperftoolsSwift

let file = NSTemporaryDirectory() + "a.profile"
Profiler.start(fname: file)
// do something
Profiler.stop()

let profilePath = NSTemporaryDirectory() + "a.profile"

app.get("profile") { (req) -> EventLoopFuture<Response> in
    let waitSecond = min((try? req.query.get(TimeInterval.self, at: "s")) ?? 30, 120)
    Profiler.start(fname: profilePath)

    let promise = req.eventLoop.makePromise(of: Response.self)
    DispatchQueue.global().asyncAfter(deadline: .now() + waitSecond) {
        Profiler.stop()
        let res = req.fileio.streamFile(at: profilePath)
        promise.completeWith(.success(res))
    }
    return promise.futureResult
}

app.get("binary") { (req) -> Response in
    return req.fileio.streamFile(at: ProcessInfo.processInfo.arguments[0])
}