perf: don't load all shopify nodes into memory at once and avoid creating many temp objects (#39138)

* perf: don't load all shopify nodes into memory at once and avoid creating many temp objects

* chore: remove debug activities

Author: pieh

Diff for: packages/gatsby-source-shopify/__tests__/fixtures/index.ts

@@ -39,6 +39,18 @@ export function mockGatsbyApi(): NodePluginArgs {
     getNodesByType: jest.fn((type: string) =>
       require(`../fixtures/shopify-nodes/${type}.json`)
     ),
+    getNode: jest.fn((nodeId: string) => {
+      const fixtureFiles = fs.readdirSync(path.join(__dirname, `../fixtures/shopify-nodes`))
+      for (const fixtureFile of fixtureFiles) {
+        const nodes = require(`../fixtures/shopify-nodes/${fixtureFile}`)
+        const node = nodes.find((n: any) => n.id === nodeId)
+        if (node) {
+          return node
+        }
+      }
+
+        return null
+    })
   } as unknown as NodePluginArgs
 }
 

Diff for: packages/gatsby-source-shopify/src/update-cache.ts

@@ -10,7 +10,6 @@ const deletionCounter: { [key: string]: number } = {}
  * invalidateNode - Recursive function that returns an array of node ids that are invalidated
  * @param gatsbyApi - Gatsby Helpers
  * @param pluginOptions - Plugin Options Object
- * @param nodeMap - Map Object of all nodes that haven't been deleted
  * @param id - The root node to invalidate
  *
  * Note: This function is designed to receive a single top-level node on the first pass
@@ -19,24 +18,26 @@ const deletionCounter: { [key: string]: number } = {}
 function invalidateNode(
   gatsbyApi: SourceNodesArgs,
   pluginOptions: IShopifyPluginOptions,
-  nodeMap: IShopifyNodeMap,
-  id: string
-): Array<string> {
+  id: string,
+  invalidatedNodeIds = new Set<string>()
+): Set<string> {
   const { typePrefix } = pluginOptions
 
-  const node = nodeMap[id]
-  let invalidatedNodeIds: Array<string> = []
+  const node = gatsbyApi.getNode(id)
 
   if (node) {
-    invalidatedNodeIds.push(node.id)
+    invalidatedNodeIds.add(node.id)
     const type = node.internal.type.replace(`${typePrefix}Shopify`, ``)
     const { coupledNodeFields } = shopifyTypes[type]
 
     if (coupledNodeFields) {
       for (const field of coupledNodeFields) {
         for (const coupledNodeId of node[field] as Array<string>) {
-          invalidatedNodeIds = invalidatedNodeIds.concat(
-            invalidateNode(gatsbyApi, pluginOptions, nodeMap, coupledNodeId)
+          invalidateNode(
+            gatsbyApi,
+            pluginOptions,
+            coupledNodeId,
+            invalidatedNodeIds
           )
         }
       }
@@ -73,39 +74,41 @@ export async function updateCache(
   pluginOptions: IShopifyPluginOptions,
   lastBuildTime: Date
 ): Promise<void> {
-  const { typePrefix } = pluginOptions
-
-  const nodeMap: IShopifyNodeMap = Object.keys(shopifyTypes)
-    .map(type => gatsbyApi.getNodesByType(`${typePrefix}Shopify${type}`))
-    .reduce((acc, value) => acc.concat(value), [])
-    .reduce((acc, value) => {
-      return { ...acc, [value.id]: value }
-    }, {})
-
   const { fetchDestroyEventsSince } = eventsApi(pluginOptions)
   const destroyEvents = await fetchDestroyEventsSince(lastBuildTime)
 
-  const invalidatedNodeIds = destroyEvents.reduce<Array<string>>(
-    (acc, value) => {
-      const shopifyId = `gid://shopify/${value.subject_type}/${value.subject_id}`
-      const nodeId = createNodeId(shopifyId, gatsbyApi, pluginOptions)
-      return acc.concat(
-        invalidateNode(gatsbyApi, pluginOptions, nodeMap, nodeId)
-      )
-    },
-    []
-  )
-
-  for (const node of Object.values(nodeMap)) {
-    if (invalidatedNodeIds.includes(node.id)) {
-      gatsbyApi.actions.deleteNode(node)
-      reportNodeDeletion(gatsbyApi, node)
-    } else {
-      gatsbyApi.actions.touchNode(node)
+  const invalidatedNodeIds = new Set<string>()
+  for (const value of destroyEvents) {
+    const shopifyId = `gid://shopify/${value.subject_type}/${value.subject_id}`
+    const nodeId = createNodeId(shopifyId, gatsbyApi, pluginOptions)
+    invalidateNode(gatsbyApi, pluginOptions, nodeId, invalidatedNodeIds)
+  }
+
+  // don't block event loop for too long
+  await new Promise(resolve => setImmediate(resolve))
+
+  for (const shopifyType of Object.keys(shopifyTypes)) {
+    {
+      // closure so we can let Node GC `nodes` (if needed) before next iteration
+      const nodes = gatsbyApi.getNodesByType(
+        `${pluginOptions.typePrefix}Shopify${shopifyType}`
+      ) as Array<IShopifyNode>
+
+      for (const node of nodes) {
+        if (invalidatedNodeIds.has(node.id)) {
+          gatsbyApi.actions.deleteNode(node)
+          reportNodeDeletion(gatsbyApi, node)
+        } else {
+          gatsbyApi.actions.touchNode(node)
+        }
+      }
     }
+
+    // don't block event loop for too long
+    await new Promise(resolve => setImmediate(resolve))
   }
 
-  if (invalidatedNodeIds.length > 0) {
+  if (invalidatedNodeIds.size > 0) {
     reportDeletionSummary(gatsbyApi)
   }
 }

Diff for: packages/gatsby-source-shopify/types/interface.d.ts

@@ -33,10 +33,6 @@ interface IBulkOperationNode {
   query: string
 }
 
-interface IShopifyNodeMap {
-  [key: string]: IShopifyNode
-}
-
 interface ICurrentBulkOperationResponse {
   currentBulkOperation: {
     id: string
@@ -129,7 +125,7 @@ interface IShopifyImage extends IShopifyNode {
 
 interface IShopifyNode {
   id: string
-  shopifyId: string
+  shopifyId?: string
   internal: {
     type: string
     mediaType?: string
@@ -147,7 +143,7 @@ interface IShopifyPluginOptions {
   shopifyConnections: Array<string>
   typePrefix: string
   salesChannel: string
-  prioritize?: boolean,
+  prioritize?: boolean
   apiVersion: string
 }