it will be probably faster on practice if it’s the only AP which you use, so if you migrate on compiler plugin and don’t use kapt, so you don’t have stub generation step, it may be faster (see for example claims from KSP about replacing kapt -
https://github.com/android/kotlin/tree/ksp/libraries/tools/kotlin-symbol-processing-api#comparison-to-kapt but also keep in mind that KSP generates Kotlin source code, not byte code, so it probably slower than pure compiler plugin)
But if you still have other APs it maybe much closer to moshi compile time (which also supports incremental AP, and It maybe not slower, maybe even faster)