What is the difference between these two lines of code to save a document to CosmosDB?

Question

I am saving documents to a CosmosDB and both the below works, Can someone please explain what the difference is? I see no performance difference and really cannot see any difference at all when running the code.

Is one going to be faster than the other when the number of documents increases?

docClient.CreateDocumentAsync(UriFactory.CreateDocumentCollectionUri(databaseName, databaseCollection), JObject.Parse(singleItem))
                            .GetAwaiter().GetResult();

await docClient.CreateDocumentAsync(UriFactory.CreateDocumentCollectionUri(databaseName, databaseCollection), JObject.Parse(singleItem));

Your question seems to boil down to using async/await vs calling synchronously. Perhaps read this as a starting point: https://stackoverflow.com/questions/23871806/async-await-performance and https://stackoverflow.com/questions/34549641/async-await-vs-getawaiter-getresult-and-callback — Dean Goodman, Aug 14 '19 at 14:39

score 0 · Answer 1 · answered Aug 14 '19 at 14:41

0

It has nothing to do with CosmosDB, in C# programing The async and await keywords are used in async programming.

Anyway the difference between those two are,

docClient.CreateDocumentAsync

This one acts as a fire and forget way, it will not wait till the record gets created and there will not be any response received. You would not know even if the document has been created or not.

whereas,

await docClient.CreateDocumentAsyn

Wait till the document gets created and response code recieved.

answered Aug 14 '19 at 14:41

Sajeetharan

216,225
63
350
396

Yes but I assume the second line can fire multiple times in parallel so how do I control how many createDocumentAsynch it launches in parallell? The first one would fire one after the other no? – Matt Douhan Aug 14 '19 at 14:45
you would use https://learn.microsoft.com/en-us/azure/cosmos-db/bulk-executor-dot-net – Sajeetharan Aug 14 '19 at 14:50
I believe thats not yet supported in .net core? – Matt Douhan Aug 14 '19 at 14:51

What is the difference between these two lines of code to save a document to CosmosDB?

1 Answers1