Improve performance of last() call on TreeMap

[craffit]

No description provided.

[codecov-io]

Codecov Report

Merging #2400 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@ Coverage Diff @@ ## master #2400 +/- ## ============================================ - Coverage 95.79% 95.79% -0.01%  - Complexity 5427 5428 +1  ============================================ Files 94 94 Lines 13110 13113 +3 Branches 1608 1608 ============================================ + Hits 12559 12561 +2  - Misses 404 405 +1  Partials 147 147

Impacted Files	Coverage Δ	Complexity Δ
vavr/src/main/java/io/vavr/collection/TreeMap.java	94.29% <100%> (+0.06%)	165 <2> (+2)	⬆️
...vr/src/main/java/io/vavr/collection/SortedMap.java	66.66% <0%> (-33.34%)	2% <0%> (-1%)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f34c252...4b3f272. Read the comment docs.

[codecov-io]

Codecov Report

Merging #2400 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@ Coverage Diff @@ ## master #2400 +/- ## ============================================ - Coverage 95.79% 95.79% -0.01%  - Complexity 5427 5428 +1  ============================================ Files 94 94 Lines 13110 13113 +3 Branches 1608 1608 ============================================ + Hits 12559 12561 +2  - Misses 404 405 +1  Partials 147 147

Impacted Files	Coverage Δ	Complexity Δ
vavr/src/main/java/io/vavr/collection/TreeMap.java	94.29% <100%> (+0.06%)	165 <2> (+2)	⬆️
...vr/src/main/java/io/vavr/collection/SortedMap.java	66.66% <0%> (-33.34%)	2% <0%> (-1%)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f34c252...4b3f272. Read the comment docs.

[danieldietrich]

Awesome, thank you - I think we missed that one :)