deriveConfiguredCodec extremely slow compared to deriveCodec

[beem812]

In an attempt to reject payloads with extra fields our project brought in the circe extras library and replaced our standard semi-auto codecs with the extras semiauto deriveConfiguredCodec. The result is that our compile times have effectively tripled.

The code for the configuration looks like this:

package <our package>

import io.circe.generic.extras.Configuration

object CirceConfig {
  val strictJson: Configuration = Configuration.default.withStrictDecoding
  implicit val implicitStrictJson: Configuration = strictJson
}

the usage sight looks like:

import <our package>.CirceConfig.implicitStrictJson


case class Foo(bar: Bar)
object Foo {
  implicit val circe = deriveConfiguredCodec[Foo]
}

is this slower derivation expected given that we're using a codec with configuration?