I know to test the response time of API is basically done by Server or Backend side, but as i am working for one application, i need to check api response time from iOS End also.
How can i do this ? i read few links where it says to do this using timer start and timer end and then find the response time by endTime - startTime but this seems not handy.
I want to use Xcode (even if XCTest is there).
Here is my one of API ( i wrote all web service consume method in separate class in ApiManager class ) :
LoginVC :
//Call Webservice
let apiManager = ApiManager()
apiManager.delegate = self
apiManager.getUserInfoAPI()
ApiManager :
func getUserInfoAPI() {
//Header
let headers = [
"Accept" : "application/json",
"Content-Type" : "application/json",
]
//Call Web API using Alamofire library
AlamoFireSharedManagerInit()
Alamofire.request(HCConstants.URL, method: .post, parameters: nil, encoding: JSONEncoding.default, headers: headers).responseJSON { response in
do{
//Checking For Error
if let error = response.result.error {
//Stop AcitivityIndicator
self.hideHud()
//Call failure delegate method
//print(error)
self.delegate?.APIFailureResponse(HCConstants.EXCEPTION_MESSAGES.SERVICE_FAILURE)
return
}
//Store Response
let responseValue = try JSONSerialization.jsonObject(with: response.data!, options: JSONSerialization.ReadingOptions()) as! Dictionary<String, AnyObject>
print(responseValue)
//Save token
if let mEmail = responseValue[HCConstants.Email] as? String {
UserDefaults.standard.setValue(mEmail, forKey: HCConstants. mEmail)
}
//Stop AcitivityIndicator
self.hideHud()
//Check Success Flag
if let _ = responseValue["info"] as? String {
//Call success delegate method
self.delegate?.apiSuccessResponse(responseValue)
}
else {
//Failure message
self.delegate?.APIFailureResponse(responseValue["message"] as? String ?? HCConstants.EXCEPTION_MESSAGES.SERVICE_FAILURE)
}
} catch {print("Exception is there "}
}
}
There's no need for a Timer
, you can just use Date
objects. You should create a Date
object representing the current date at the time of starting your API request and in the completionHandler of your API request, use Date().timeIntervalSince(date: startDate)
to calculate the number of seconds that passed.
Assuming you have a function for your requests that is returning a closure as a completion handler, this is how you can measure its execution time:
let startDate = Date()
callMyAPI(completion: { returnValue in
let executionTime = Date().timeIntervalSince(date: startDate)
})
Xcode itself doesn't have any profiling tools, but you can use Time Profiler in Instruments, however, I am not sure if would give the correct results for asynchronous functions.
Solution for your specific function: you can save the startDate
right after the function call. Then you can measure the execution time in several places (included each): right after the network request finishes (at the beginning of the completion handler) and in each if statement
right before your delegate method is called.
func getUserInfoAPI() {
let startDate = Date()
...
Alamofire.request(HCConstants.URL, method: .post, parameters: nil, encoding: JSONEncoding.default, headers: headers).responseJSON { response in
//calculate the time here if you only care about the time taken for the network request
let requestExecutionTime = Date().timeIntervalSince(date: startDate)
do{
if let error = response.result.error {
self.hideHud()
let executionTimeWithError = Date().timeIntervalSince(date: startDate)
self.delegate?.APIFailureResponse(HCConstants.EXCEPTION_MESSAGES.SERVICE_FAILURE)
return
}
//Store Response
...
//Check Success Flag
if let _ = responseValue["info"] as? String {
//Call success delegate method
let executionTimeWithSuccess = Date().timeIntervalSince(date: startDate)
self.delegate?.apiSuccessResponse(responseValue)
}
else {
//Failure message
let executionTimeWithFailure = Date().timeIntervalSince(date: startDate)
self.delegate?.APIFailureResponse(responseValue["message"] as? String ?? HCConstants.EXCEPTION_MESSAGES.SERVICE_FAILURE)
}
} catch {print("Exception is there "}
}
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With