Enable Offline Work:

1. Click File -> Settings. Search for “gradle” and click in Offline work box.
2. Go to Compiler (in same settings dialog just below Gradle) and add --offline to Command-line Options text box.

Improve Gradle Performance

Add following two line of code in your gradle.properties file.

org.gradle.daemon=true
org.gradle.parallel=true

Increasing the value of -Xmx and -Xms in studio.vmoptions file

-Xms1024m
-Xmx4096m
-XX:MaxPermSize=1024m
-XX:ReservedCodeCacheSize=256m
-XX:+UseCompressedOops

Window

%USERPROFILE%.{FOLDER_NAME}\studio.exe.vmoptions and/or %USERPROFILE%.{FOLDER_NAME}\studio64.exe.vmoptions

Mac

~/Library/Preferences/{FOLDER_NAME}/studio.vmoptions

Linux

~/.{FOLDER_NAME}/studio.vmoptions and/or ~/.{FOLDER_NAME}/studio64.vmoptions