From c8da472ce49199d0d5fe58ef98e5a08f2a9a16bd Mon Sep 17 00:00:00 2001
From: Eugene Terehov <opensource@terehov.de>
Date: Thu, 24 Dec 2020 00:25:39 +0100
Subject: [PATCH] README: Performance node added

---
 README.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 56a2c783..f045a9e1 100644
--- a/README.md
+++ b/README.md
@@ -525,8 +525,10 @@ Set a custom pretty log delimiter.
 ##### `dateTimePattern`
 ```default: "year-month-day hour:minute:second.millisecond"```
 
+> **Caution!** Changing this pattern will affect performance (invocation of Intl.DateTimeFormat)
+
 Change the way `tslog` prints out the date.
-Based on Intl.DateTimeFormat.formatToParts with additional milliseconds, you can use type as a placeholder.
+Based on Intl.DateTimeFormat formatToParts with additional milliseconds, you can use type as a placeholder.
 Available placeholders are: `day`,  `dayPeriod`, `era`, `hour`,  `literal`,  `minute`,  `month`, `second`, `millisecond`, `timeZoneName`, `weekday` and `year`.
 
 ##### `dateTimeTimezone`
@@ -538,6 +540,8 @@ Possible values are `utc` and <a href="https://www.iana.org/time-zones" target="
 > **Hint:** If you want to use your local time zone, you can set:
 > `dateTimeTimezone: Intl.DateTimeFormat().resolvedOptions().timeZone`
 
+> **Caution!** Changing this pattern will affect performance (invocation of Intl.DateTimeFormat)
+
 ##### `prefix`
 ```default: [] ```