Improve performance and fixes

[justin-tay]

Closes #1082

Adds some possible performance improvements and fixes an issue with resolve

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 91.17647% with 3 lines in your changes missing coverage. Please review.

Project coverage is 78.12%. Comparing base (48ca3c2) to head (ae876e4).
Report is 46 commits behind head on master.

Files	Patch %	Lines
...main/java/com/networknt/schema/SchemaLocation.java	91.30%	0 Missing and 2 partials ⚠️
src/main/java/com/networknt/schema/JsonSchema.java	66.66%	0 Missing and 1 partial ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1086      +/-   ##
============================================
- Coverage     78.90%   78.12%   -0.78%     
- Complexity     1965     2070     +105     
============================================
  Files           172      201      +29     
  Lines          6352     6894     +542     
  Branches       1255     1265      +10     
============================================
+ Hits           5012     5386     +374     
- Misses          867     1032     +165     
- Partials        473      476       +3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.