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perf(ivy): avoid repeated tView.firstTemplatePass writes (#31839) 

PR Close #31839
This commit is contained in:
Pawel Kozlowski 2019-07-24 16:12:20 +02:00 committed by Andrew Kushnir
parent 4f42eb4e77
commit a77d0e22bf
1 changed files with 5 additions and 8 deletions
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13
packages/core/src/render3/instructions/shared.ts
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@ -63,7 +63,11 @@ export function refreshDescendantViews(lView: LView) {
const tView = lView[TVIEW]; const tView = lView[TVIEW];
const creationMode = isCreationMode(lView); const creationMode = isCreationMode(lView);
// This needs to be set before children are processed to support recursive components // This needs to be set before children are processed to support recursive components.
// This must be set to false immediately after the first creation run because in an
// ngFor loop, all the views will be created together before update mode runs and turns
// off firstTemplatePass. If we don't set it here, instances will perform directive
// matching, etc again and again.
tView.firstTemplatePass = false; tView.firstTemplatePass = false;
// Resetting the bindingIndex of the current LView as the next steps may trigger change detection. // Resetting the bindingIndex of the current LView as the next steps may trigger change detection.
@ -413,13 +417,6 @@ export function renderEmbeddedTemplate<T>(viewToRender: LView, tView: TView, con
oldView = enterView(viewToRender, viewToRender[T_HOST]); oldView = enterView(viewToRender, viewToRender[T_HOST]);
resetPreOrderHookFlags(viewToRender); resetPreOrderHookFlags(viewToRender);
executeTemplate(viewToRender, tView.template !, getRenderFlags(viewToRender), context); executeTemplate(viewToRender, tView.template !, getRenderFlags(viewToRender), context);
// This must be set to false immediately after the first creation run because in an
// ngFor loop, all the views will be created together before update mode runs and turns
// off firstTemplatePass. If we don't set it here, instances will perform directive
// matching, etc again and again.
tView.firstTemplatePass = false;
refreshDescendantViews(viewToRender); refreshDescendantViews(viewToRender);
safeToRunHooks = true; safeToRunHooks = true;
} finally { } finally {