Performance | Code cleanup to improve performance

[ulvii]

No description provided.

[codecov-io]

Codecov Report

Merging #1075 into dev will decrease coverage by 1.6%.
The diff coverage is 37.5%.

@@             Coverage Diff              @@
##                dev    #1075      +/-   ##
============================================
- Coverage     54.62%   53.01%   -1.61%     
+ Complexity     3375     3162     -213     
============================================
  Files           124      119       -5     
  Lines         28755    28053     -702     
  Branches       4769     4678      -91     
============================================
- Hits          15706    14871     -835     
- Misses        10785    10953     +168     
+ Partials       2264     2229      -35

Impacted Files	Coverage Δ	Complexity Δ
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	60.97% <ø> (-0.53%)	0 <0> (ø)
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	60.12% <ø> (ø)	91 <0> (ø)	⬇️
.../microsoft/sqlserver/jdbc/SQLServerDataSource.java	46.39% <ø> (-2.2%)	71 <0> (-9)
...n/java/com/microsoft/sqlserver/jdbc/DataTypes.java	80.3% <ø> (ø)	6 <0> (ø)	⬇️
...oft/sqlserver/jdbc/SQLServerBulkCSVFileRecord.java	47.39% <0%> (-0.46%)	28 <0> (ø)
...m/microsoft/sqlserver/jdbc/KerbAuthentication.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...crosoft/sqlserver/jdbc/dns/DNSKerberosLocator.java	0% <0%> (-37.5%)	0 <0> (-1)
...rc/main/java/com/microsoft/sqlserver/jdbc/dtv.java	68.64% <100%> (-0.14%)	0 <0> (ø)
...rc/main/java/com/microsoft/sqlserver/jdbc/TVP.java	43.72% <100%> (ø)	26 <0> (ø)	⬇️
...oft/sqlserver/jdbc/SQLServerCallableStatement.java	29.51% <100%> (-0.09%)	100 <0> (ø)
... and 37 more

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[dmitri-blinov]

Replacing String.startsWith(x) with String.charAt(0) == x may lead to an exception being thrown for the empty string "".

[ulvii]

Hi @dmitri-blinov ,
Thank you for bringing this to our attention. I reverted the changes to not introduce a regression.