in src/commands/createWebApp/setPostPromptDefaults.ts [105:115]
function checkPlanForPerformanceDrop(asp: WebSiteManagementModels.AppServicePlan | undefined): boolean {
// for free and basic plans, there is a perf drop after 3 active apps are running
if (asp && asp.numberOfSites !== undefined && asp.numberOfSites >= maxNumberOfSites) {
const tier: string | undefined = asp.sku && asp.sku.tier;
if (tier && /^(basic|free)$/i.test(tier)) {
return true;
}
}
return false;
}