feat(baseapp): add per message telemetry

CHANGELOG.md

@@ -89,6 +89,7 @@ Every module contains its own CHANGELOG.md. Please refer to the module you are i
 * (x/validate) [#21822](https://github.com/cosmos/cosmos-sdk/pull/21822) New module solely responsible for providing ante/post handlers and tx validators for v2. It can be extended by the app developer to provide extra tx validators.
     * In comparison to x/auth/tx/config, there is no app config to skip ante/post handlers, as overwriting them in baseapp or not injecting the x/validate module has the same effect.
 * (baseapp) [#21979](https://github.com/cosmos/cosmos-sdk/pull/21979) Create CheckTxHandler to allow extending the logic of CheckTx.
+* (baseapp) [[#13981](https://github.com/cosmos/cosmos-sdk/issues/13981)] Add per-message telemetry.
 
 ### Improvements
 

baseapp/baseapp.go

@@ -1030,13 +1030,14 @@ func (app *BaseApp) runTx(mode execMode, txBytes []byte, tx sdk.Tx) (gInfo sdk.G
 func (app *BaseApp) runMsgs(ctx sdk.Context, msgs []sdk.Msg, reflectMsgs []protoreflect.Message, mode execMode) (*sdk.Result, error) {
 	events := sdk.EmptyEvents()
 	msgResponses := make([]*codectypes.Any, 0, len(msgs))
-
 	// NOTE: GasWanted is determined by the AnteHandler and GasUsed by the GasMeter.
 	for i, msg := range msgs {
 		if mode != execModeFinalize && mode != execModeSimulate {
 			break
 		}
 
+		start := telemetry.Now()
+
 		handler := app.msgServiceRouter.Handler(msg)
 		if handler == nil {
 			return nil, errorsmod.Wrapf(sdkerrors.ErrUnknownRequest, "no message handler found for %T", msg)
@@ -1076,6 +1077,8 @@ func (app *BaseApp) runMsgs(ctx sdk.Context, msgs []sdk.Msg, reflectMsgs []proto
 			}
 			msgResponses = append(msgResponses, msgResponse)
 		}
+
+		telemetry.MeasureSince(start, "tx", "msg", "processing_time", sdk.MsgTypeURL(msg))
 	}
 
 	data, err := makeABCIData(msgResponses)