fastDomIf - uses host's runtime template stamping API rather than templatizer as optimization (lighter-weight, since dom-if doesn't introduce a new scope
removeNestedTemplates - removes the <template> element from a dom-if or dom-repeat, and instead moves the host bindings to the parent
New settings:
fastDomIf- uses host's runtime template stamping API rather than templatizer as optimization (lighter-weight, since dom-if doesn't introduce a new scoperemoveNestedTemplates- removes the<template>element from adom-ifordom-repeat, and instead moves the host bindings to the parent