From e7b841a138667a72b368d03d827a41c88174854d Mon Sep 17 00:00:00 2001
From: Rhys Arkins <rhys@arkins.net>
Date: Thu, 18 Nov 2021 15:36:05 +0100
Subject: [PATCH] feat: regex cache (#12738)
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
---
lib/util/regex.ts | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/lib/util/regex.ts b/lib/util/regex.ts
index ac956bf18c..fe3479c444 100644
--- a/lib/util/regex.ts
+++ b/lib/util/regex.ts
@@ -5,6 +5,8 @@ import { logger } from '../logger';
let RegEx: RegExpConstructor;
+const cache = new Map<string, RegExp>();
+
try {
// eslint-disable-next-line
const RE2 = require('re2');
@@ -18,8 +20,16 @@ try {
}
export function regEx(pattern: string | RegExp, flags?: string): RegExp {
+ const key = `${pattern.toString()}:${flags}`;
+
+ if (cache.has(key)) {
+ return cache.get(key);
+ }
+
try {
- return new RegEx(pattern, flags);
+ const instance = new RegEx(pattern, flags);
+ cache.set(key, instance);
+ return instance;
} catch (err) {
const error = new Error(CONFIG_VALIDATION);
error.validationSource = pattern.toString();
--
GitLab