Performance fix from @brettwooldridge

[TobiasSQL]

Per comment in issue #166 from @brettwooldridge from his speedify branch. Try to get this into RTW.

[codecov-io]

Codecov Report

Merging #347 into RTW_6.2.0 will increase coverage by <.01%.
The diff coverage is 66.66%.

@@               Coverage Diff               @@
##             RTW_6.2.0     #347      +/-   ##
===============================================
+ Coverage        37.32%   37.32%   +<.01%     
- Complexity        1769     1776       +7     
===============================================
  Files              107      107              
  Lines            24480    24482       +2     
  Branches          4036     4036              
===============================================
+ Hits              9136     9138       +2     
- Misses           13625    13635      +10     
+ Partials          1719     1709      -10

Flag	Coverage Δ	Complexity Δ
#JDBC41	37.18% <66.66%> (+0.07%)	1769 <1> (+8)	⬆️
#JDBC42	37.16% <66.66%> (-0.07%)	1768 <1> (+2)

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/com/microsoft/sqlserver/jdbc/Util.java	46.83% <66.66%> (-0.22%)	57 <1> (-1)
...om/microsoft/sqlserver/jdbc/ReaderInputStream.java	46.06% <0%> (-2.25%)	17% <0%> (ø)
...in/java/com/microsoft/sqlserver/jdbc/IOBuffer.java	44.2% <0%> (-0.48%)	0% <0%> (ø)
...om/microsoft/sqlserver/jdbc/SQLServerBulkCopy.java	49% <0%> (+0.21%)	211% <0%> (+2%)	⬆️
...ncurrentlinkedhashmap/ConcurrentLinkedHashMap.java	42.42% <0%> (+0.21%)	46% <0%> (ø)	⬇️
...m/microsoft/sqlserver/jdbc/SQLServerResultSet.java	27.53% <0%> (+0.29%)	189% <0%> (+2%)	⬆️
...m/microsoft/sqlserver/jdbc/SQLServerStatement.java	59.36% <0%> (+0.3%)	130% <0%> (+1%)	⬆️
...om/microsoft/sqlserver/jdbc/SimpleInputStream.java	48.88% <0%> (+1.48%)	10% <0%> (+1%)	⬆️
src/main/java/microsoft/sql/DateTimeOffset.java	40% <0%> (+2.85%)	10% <0%> (+2%)	⬆️

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