I am using Ktor darwin-legacy (2.3.9) for my KMP iOS app, and running Instruments I see what appear ...

# ktor

[tylerwilson]

I am using Ktor darwin-legacy (2.3.9) for my KMP iOS app, and running Instruments I see what appear to be leaks on nearly every API call. Has anybody else seen this behavior, and perhaps there is a simple fix for it? I see a good number of bodyAsText along with other calls which makes me think any memory allocated to handle the response and parsing are the culprit. Thank you.

[Aleksei Tirman [JB]]

Are you able to reproduce the leaks with the non-legacy artifact (ktor-client-darwin)?

[tylerwilson]

I moved to use the 'regular' darwin (I use legacy because we need iOS !2 support in one of our apps). I debugged again and found one repeated leak caused by me (a custom HMAC SHA1 calculation). Changed that to use KotlinCrypto package, and that one is fixed.
Still see a repeated 4K leak on every call in Ktor though. See next text snippet.

[tylerwilson]

Untitled

Untitled

[tylerwilson]

Note: after looking in more detail, it appears the leak only appears for those network calls I am doing in a suspend function. I am calling something like:

MainScope().launch {
    withContext(Dispatchers.Main) {
         callSuspendAPIMethod()
    }
}

Perhaps I am doing something wrong here - I am no coroutines expert...

[Aleksei Tirman [JB]]

Does it leak if you use a dispatcher other than Dispatchers.Main?