From 8d320497d6ed522af0b3ce110d5cf8db52300bea Mon Sep 17 00:00:00 2001
From: Lucas Hansen <lucashansen@gmail.com>
Date: Mon, 2 Apr 2018 16:37:08 -0700
Subject: [PATCH] Cache linker cache files in memory (#9794)

---
 tools/isobuild/compiler-plugin.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/isobuild/compiler-plugin.js b/tools/isobuild/compiler-plugin.js
index 1d22b22bac..a352c9d063 100644
--- a/tools/isobuild/compiler-plugin.js
+++ b/tools/isobuild/compiler-plugin.js
@@ -18,6 +18,7 @@ import {cssToCommonJS} from "./css-modules.js";
 import Resolver from "./resolver.js";
 import {
   optimisticStatOrNull,
+  optimisticReadJsonOrNull,
 } from "../fs/optimistic.js";
 
 import { isTestFilePath } from './test-files.js';
@@ -1406,7 +1407,7 @@ export class PackageSourceBatch {
     if (cacheFilename) {
       let diskCached = null;
       try {
-        diskCached = files.readJSONOrNull(cacheFilename);
+        diskCached = optimisticReadJsonOrNull(cacheFilename);
       } catch (e) {
         // Ignore JSON parse errors; pretend there was no cache.
         if (!(e instanceof SyntaxError)) {