Remove Mutation overhead from Lite SDK

Author: schmidt-sebastian

packages/firestore/lite/test/dependencies.json

@@ -123,7 +123,7 @@ export class ServerTimestampFieldValueImpl extends SerializableFieldValue {
   }
 
   _toFieldTransform(context: ParseContext): FieldTransform {
-    return new FieldTransform(context.path!, ServerTimestampTransform.instance);
+    return new FieldTransform(context.path!, new ServerTimestampTransform());
   }
 
   isEqual(other: FieldValue): boolean {

packages/firestore/src/api/field_value.ts

@@ -35,7 +35,7 @@ import { ResourcePath } from '../model/path';
 import { debugAssert } from '../util/assert';
 import { IndexManager } from './index_manager';
 import { MutationQueue } from './mutation_queue';
-import { PatchMutation } from '../model/mutation';
+import { applyMutationToLocalView, PatchMutation } from '../model/mutation';
 import { PersistenceTransaction } from './persistence';
 import { PersistencePromise } from './persistence_promise';
 import { RemoteDocumentCache } from './remote_document_cache';
@@ -258,7 +258,8 @@ export class LocalDocumentsView {
             for (const mutation of batch.mutations) {
               const key = mutation.key;
               const baseDoc = results.get(key);
-              const mutatedDoc = mutation.applyToLocalView(
+              const mutatedDoc = applyMutationToLocalView(
+                mutation,
                 baseDoc,
                 baseDoc,
                 batch.localWriteTime

packages/firestore/src/local/local_documents_view.ts

@@ -30,7 +30,12 @@ import {
 } from '../model/collections';
 import { MaybeDocument, NoDocument } from '../model/document';
 import { DocumentKey } from '../model/document_key';
-import { Mutation, PatchMutation, Precondition } from '../model/mutation';
+import {
+  Mutation,
+  PatchMutation,
+  Precondition,
+  extractMutationBaseValue
+} from '../model/mutation';
 import {
   BATCHID_UNKNOWN,
   MutationBatch,
@@ -449,7 +454,8 @@ class LocalStoreImpl implements LocalStore {
           const baseMutations: Mutation[] = [];
 
           for (const mutation of mutations) {
-            const baseValue = mutation.extractBaseValue(
+            const baseValue = extractMutationBaseValue(
+              mutation,
               existingDocs.get(mutation.key)
             );
             if (baseValue != null) {