Build time is too long in Xcode 8.3 with swift 3 in particular file

Question

Im using Xcode 8.3 with Swift 3. I have written one method named pdfFromData(data:) to form the pdf document from the Data, whenever I build my project its not getting build due to this method, means the compiler is got stopped/hanged when it start compile particular file where I coded pdfFromData(data:) method(In Xcode 8.2 with Swift 3 it worked fine). Whenever i comment this method and build means everything working fine.

func pdfFromData(data: Data) -> CGPDFDocument? { // Form pdf document from the data.

    if let pdfData = data as? CFData {
        if let provider = CGDataProvider(data: pdfData) {
            let pdfDocument = CGPDFDocument(provider)
            return pdfDocument
        }
    }
    return nil

}

What's wrong with this method?. I want to build my project with this method as well. Thanks in advance.

Unrelated to your issue, but you might want to consider using `guard let ...` instead of `if let ...`, to bail out early and avoid "indent hadouken". — Nicolas Miari, Apr 17 '17 at 08:12
@NicolasMiari I have tried by using `guard let` instead of `if let`. Nothing helped, still that issue persist. — Karthick Selvaraj, Apr 17 '17 at 08:35
Like I said, it has nothing to do with your issue; just some style advice. — Nicolas Miari, Apr 17 '17 at 08:36
Does compile time return to normal if you **comment out** the body of that function? — Nicolas Miari, Apr 17 '17 at 08:37
@Karthick, please check my answer and let me know if it helps — KrishnaCA, Apr 17 '17 at 13:27

KrishnaCA · Accepted Answer · 2017-04-18T05:19:51.707

I tried debugging your issue. This is what I found out:

if let pdfData = data as? CFData {

}

The above line for casting object of type Data to CFData is where it's taking too much time to build.

Replacing that with the following piece of code significantly reduces your build time.

let pdfNsData: NSData = NSData(data: data) // convert `Data` to `NSData`

if let cfPdfData: CFData = pdfNsData as? CFData { 
// cast `NSData` to `CFData`

}

NSData and CFData are toll-free bridged.

Please let me know if there's any doubt

Build time is too long in Xcode 8.3 with swift 3 in particular file

1 Answers1