Add feature flag for increasing page size

app/assets/javascripts/repository/components/tree_content.vue

 <script>
 import filesQuery from 'shared_queries/repository/files.query.graphql';
 import createFlash from '~/flash';
+import glFeatureFlagMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import { __ } from '../../locale';
 import { TREE_PAGE_SIZE, TREE_INITIAL_FETCH_COUNT, TREE_PAGE_LIMIT } from '../constants';
 import getRefMixin from '../mixins/get_ref';
@@ -14,7 +15,7 @@ export default {
     FileTable,
     FilePreview,
   },
-  mixins: [getRefMixin],
+  mixins: [getRefMixin, glFeatureFlagMixin()],
   apollo: {
     projectPath: {
       query: projectPathQuery,
@@ -52,7 +53,9 @@ export default {
     pageSize() {
       // we want to exponentially increase the page size to reduce the load on the frontend
       const exponentialSize = (TREE_PAGE_SIZE / TREE_INITIAL_FETCH_COUNT) * (this.fetchCounter + 1);
-      return exponentialSize < TREE_PAGE_SIZE ? exponentialSize : TREE_PAGE_SIZE;
+      return exponentialSize < TREE_PAGE_SIZE && this.glFeatures.increasePageSizeExponentially
+        ? exponentialSize
+        : TREE_PAGE_SIZE;
     },
     totalEntries() {
       return Object.values(this.entries).flat().length;

app/controllers/projects_controller.rb

@@ -37,6 +37,7 @@ class ProjectsController < Projects::ApplicationController
 
   before_action do
     push_frontend_feature_flag(:refactor_blob_viewer, @project, default_enabled: :yaml)
+    push_frontend_feature_flag(:increase_page_size_exponentially, @project, default_enabled: :yaml)
   end
 
   layout :determine_layout

config/feature_flags/development/increase_page_size_exponentially.yml

+---
+name: increase_page_size_exponentially
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/66174
+rollout_issue_url: 
+milestone: '14.1'
+type: development
+group: group::source code
+default_enabled: false

spec/frontend/repository/components/tree_content_spec.js

@@ -19,6 +19,11 @@ function factory(path, data = () => ({})) {
     mocks: {
       $apollo,
     },
+    provide: {
+      glFeatures: {
+        increasePageSizeExponentially: true,
+      },
+    },
   });
 }