fix: this._instance is repeated a lot

[pauldambra]

this._instance (256 times) and this._instance.config (71 times) are repeated a lot in the built output

if we could mangle them or reduce that
then the bundle would be smaller

we did try mangling _instance and had problems so it is in terser's reserved config

but we must be able to do something here

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Project	Deployment	Preview	Updated (UTC)
posthog-js	Ready	Preview	Sep 5, 2025 7:22am

[github-actions]

Download bundle size visualization

[github-actions]

Size Change: -17.6 kB (-0.34%)

Total Size: 5.22 MB

Filename	Size	Change
packages/browser/dist/all-external-dependencies.js	221 kB	+117 B (+0.05%)
packages/browser/dist/array.full.es5.js	314 kB	-517 B (-0.16%)
packages/browser/dist/array.full.js	375 kB	-2.22 kB (-0.59%)
packages/browser/dist/array.full.no-external.js	394 kB	-1.45 kB (-0.37%)
packages/browser/dist/array.js	174 kB	-2.16 kB (-1.23%)
packages/browser/dist/array.no-external.js	191 kB	-1.55 kB (-0.81%)
packages/browser/dist/dead-clicks-autocapture.js	12.7 kB	+108 B (+0.86%)
packages/browser/dist/lazy-recorder.js	146 kB	-240 B (-0.16%)
packages/browser/dist/main.js	175 kB	-2.16 kB (-1.22%)
packages/browser/dist/module.full.js	375 kB	-2.22 kB (-0.59%)
packages/browser/dist/module.full.no-external.js	394 kB	-1.45 kB (-0.37%)
packages/browser/dist/module.js	175 kB	-2.16 kB (-1.22%)
packages/browser/dist/module.no-external.js	191 kB	-1.55 kB (-0.81%)
packages/browser/dist/posthog-recorder.js	241 kB	-239 B (-0.1%)
packages/browser/dist/surveys.js	79.9 kB	+148 B (+0.19%)

ℹ️ View Unchanged

Filename	Size
packages/ai/dist/anthropic/index.cjs	16.1 kB
packages/ai/dist/anthropic/index.mjs	16 kB
packages/ai/dist/gemini/index.cjs	15.4 kB
packages/ai/dist/gemini/index.mjs	15.2 kB
packages/ai/dist/index.cjs	119 kB
packages/ai/dist/index.mjs	118 kB
packages/ai/dist/langchain/index.cjs	39.6 kB
packages/ai/dist/langchain/index.mjs	39 kB
packages/ai/dist/openai/index.cjs	29 kB
packages/ai/dist/openai/index.mjs	28.8 kB
packages/ai/dist/vercel/index.cjs	21.9 kB
packages/ai/dist/vercel/index.mjs	21.9 kB
packages/browser/dist/crisp-chat-integration.js	1.97 kB
packages/browser/dist/customizations.full.js	16.1 kB
packages/browser/dist/exception-autocapture.js	9.55 kB
packages/browser/dist/external-scripts-loader.js	2.81 kB
packages/browser/dist/intercom-integration.js	2.02 kB
packages/browser/dist/recorder-v2.js	113 kB
packages/browser/dist/recorder.js	113 kB
packages/browser/dist/surveys-preview.js	71.1 kB
packages/browser/dist/tracing-headers.js	1.84 kB
packages/browser/dist/web-vitals.js	10.4 kB
packages/browser/react/dist/esm/index.js	14.8 kB
packages/browser/react/dist/umd/index.js	17.5 kB
packages/core/dist/eventemitter.js	1.78 kB
packages/core/dist/eventemitter.mjs	571 B
packages/core/dist/featureFlagUtils.js	7.56 kB
packages/core/dist/featureFlagUtils.mjs	5.34 kB
packages/core/dist/gzip.js	1.95 kB
packages/core/dist/gzip.mjs	650 B
packages/core/dist/index.js	71.8 kB
packages/core/dist/index.mjs	59.2 kB
packages/core/dist/testing/index.js	2.93 kB
packages/core/dist/testing/index.mjs	79 B
packages/core/dist/testing/PostHogCoreTestClient.js	3.5 kB
packages/core/dist/testing/PostHogCoreTestClient.mjs	2.11 kB
packages/core/dist/testing/test-utils.js	2.35 kB
packages/core/dist/testing/test-utils.mjs	783 B
packages/core/dist/types.js	8.2 kB
packages/core/dist/types.mjs	5.93 kB
packages/core/dist/utils/bucketed-rate-limiter.js	3.4 kB
packages/core/dist/utils/bucketed-rate-limiter.mjs	2.02 kB
packages/core/dist/utils/index.js	9.33 kB
packages/core/dist/utils/index.mjs	1.95 kB
packages/core/dist/utils/number-utils.js	2 kB
packages/core/dist/utils/number-utils.mjs	735 B
packages/core/dist/utils/promise-queue.js	2 kB
packages/core/dist/utils/promise-queue.mjs	768 B
packages/core/dist/utils/string-utils.js	1.91 kB
packages/core/dist/utils/string-utils.mjs	414 B
packages/core/dist/utils/type-utils.js	5.2 kB
packages/core/dist/utils/type-utils.mjs	1.95 kB
packages/core/dist/vendor/uuidv7.js	8.57 kB
packages/core/dist/vendor/uuidv7.mjs	7 kB
packages/nextjs-config/dist/config.js	5.51 kB
packages/nextjs-config/dist/config.mjs	4.03 kB
packages/nextjs-config/dist/index.js	2.24 kB
packages/nextjs-config/dist/index.mjs	30 B
packages/nextjs-config/dist/utils.js	6.04 kB
packages/nextjs-config/dist/utils.mjs	3.51 kB
packages/nextjs-config/dist/utils.spec.js	723 B
packages/nextjs-config/dist/utils.spec.mjs	455 B
packages/nextjs-config/dist/webpack-plugin.js	3.69 kB
packages/nextjs-config/dist/webpack-plugin.mjs	1.98 kB
packages/node/dist/edge/index.cjs	109 kB
packages/node/dist/edge/index.mjs	108 kB
packages/node/dist/node/index.cjs	123 kB
packages/node/dist/node/index.mjs	123 kB
packages/react-native/dist/autocapture.js	4.68 kB
packages/react-native/dist/frameworks/wix-navigation.js	1.3 kB
packages/react-native/dist/hooks/useFeatureFlag.js	1.49 kB
packages/react-native/dist/hooks/useFeatureFlags.js	821 B
packages/react-native/dist/hooks/useNavigationTracker.js	2.46 kB
packages/react-native/dist/hooks/usePostHog.js	467 B
packages/react-native/dist/index.js	3.12 kB
packages/react-native/dist/native-deps.js	13.9 kB
packages/react-native/dist/optional/OptionalAsyncStorage.js	299 B
packages/react-native/dist/optional/OptionalExpoApplication.js	377 B
packages/react-native/dist/optional/OptionalExpoDevice.js	347 B
packages/react-native/dist/optional/OptionalExpoFileSystem.js	386 B
packages/react-native/dist/optional/OptionalExpoFileSystemLegacy.js	423 B
packages/react-native/dist/optional/OptionalExpoLocalization.js	383 B
packages/react-native/dist/optional/OptionalReactNativeDeviceInfo.js	415 B
packages/react-native/dist/optional/OptionalReactNativeLocalize.js	303 B
packages/react-native/dist/optional/OptionalReactNativeNavigation.js	415 B
packages/react-native/dist/optional/OptionalReactNativeNavigationWix.js	443 B
packages/react-native/dist/optional/OptionalReactNativeSafeArea.js	644 B
packages/react-native/dist/optional/OptionalSessionReplay.js	455 B
packages/react-native/dist/posthog-rn.js	28.7 kB
packages/react-native/dist/PostHogContext.js	329 B
packages/react-native/dist/PostHogProvider.js	4.77 kB
packages/react-native/dist/storage.js	3.39 kB
packages/react-native/dist/surveys/components/BottomSection.js	1.34 kB
packages/react-native/dist/surveys/components/Cancel.js	909 B
packages/react-native/dist/surveys/components/ConfirmationMessage.js	1.63 kB
packages/react-native/dist/surveys/components/QuestionHeader.js	1.11 kB
packages/react-native/dist/surveys/components/QuestionTypes.js	10.1 kB
packages/react-native/dist/surveys/components/SurveyModal.js	3.95 kB
packages/react-native/dist/surveys/components/Surveys.js	6.18 kB
packages/react-native/dist/surveys/getActiveMatchingSurveys.js	3.48 kB
packages/react-native/dist/surveys/icons.js	7.76 kB
packages/react-native/dist/surveys/index.js	600 B
packages/react-native/dist/surveys/PostHogSurveyProvider.js	5.61 kB
packages/react-native/dist/surveys/surveys-utils.js	8.96 kB
packages/react-native/dist/surveys/useActivatedSurveys.js	3.38 kB
packages/react-native/dist/surveys/useSurveyStorage.js	2.16 kB
packages/react-native/dist/types.js	70 B
packages/react-native/dist/version.js	129 B
packages/react/dist/esm/index.js	14.8 kB
packages/react/dist/umd/index.js	17.5 kB
packages/web/dist/index.cjs	13.8 kB
packages/web/dist/index.mjs	13.7 kB
tooling/rollup-utils/dist/index.js	1.17 kB

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