From 4381b3f64d07f259cf972e4724d0c1765f72e513 Mon Sep 17 00:00:00 2001
From: Ethan Mills <ethan.mills@digital.cabinet-office.gov.uk>
Date: Mon, 5 Feb 2024 11:40:42 +0000
Subject: [PATCH] ATO-459: cache nunjucks templates

This should reduce disk iops and improve overall performance when rendering templates.
---
 src/config/nunchucks.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/config/nunchucks.ts b/src/config/nunchucks.ts
index 23a02dc66..6457799c5 100644
--- a/src/config/nunchucks.ts
+++ b/src/config/nunchucks.ts
@@ -3,6 +3,8 @@ import * as nunjucks from "nunjucks";
 import { Environment } from "nunjucks";
 import i18next from "i18next";
 import { returnLastCharactersOnly } from "../utils/phone-number";
+import { getNodeEnv } from "../config";
+import { ENVIRONMENT_NAME } from "../app.constants";
 
 export function configureNunjucks(
   app: express.Application,
@@ -11,7 +13,7 @@ export function configureNunjucks(
   const nunjucksEnv: nunjucks.Environment = nunjucks.configure(viewsPath, {
     autoescape: true,
     express: app,
-    noCache: true,
+    noCache: getNodeEnv() !== ENVIRONMENT_NAME.PROD,
   });
 
   nunjucksEnv.addFilter("translate", function (key: string, options?: any) {