* add elh's Go solution

* update elh. fix a bad for loop and add some tuning env vars

* first double as int

* - hashcode

* JAVA_OPTS empty

* native

* native

* CalculateAverage_melgenek
https://questdb.io/blog/building-faster-hash-table-high-performance-sql-joins/#fastmap-internals

* mvn formatting

* jvm model

* 10k name

* 10k name

* round mean

* limit ChunkSize smaller than Integer.MAX_VALUE

---------

Co-authored-by: martin.cong <martin.cong@zhulinkeji.com>

* Smoofie solution. Kinda slow but it was fun :)

* Format according to mvn build

* Fix semicolon detection, which cause invalid temperature parsing and subsequently segmentation faults due to counter addressing

* Add submission

* Added explanatory comment

* Added comment

* Rename shell script

* Commit formatting

* When last bytes don't fill a vector, take directly

* Add comment

* Deal with subset collisions

* Common sense implementation

* fix filename

* formatting

* remove excess system.out.println

* fix hash collisions

* ajdust so taht segment size smaller than Integer.MAX_VALUE

* dpsoft: first submission

* minor clean up

* map with linear probing

* clean up

* update prepare

* clean up

* remove string format

* add credits

* fix format

* use prepare.sh

* graal 21.0.2

* fix differences

* clean up

* underflow protection

* improve segments generation logic

* clean up

* remove unnecessary alignment in findsegment

* new try

* fix number of segments

* CalculateAverage_pdrakatos

* Rename to be valid with rules

* CalculateAverage_pdrakatos

* Rename to be valid with rules

* Changes on scripts execution

* Fixing bugs causing scripts not to be executed

* Changes on prepare make it compatible

* Fixing passing all tests

* Increase direct memory allocation buffer

* Fixing memory problem causes heap space exception

* Fresh solution to optimize performance of the execution

* New Fresh solution with optimized performance with Custom Hashtable

* Increase maxperm size and xmx to avoid heap spaces error

Backported some of the optimizations from unsafe solution.

Co-authored-by: Giedrius D <d.giedrius@gmail.com>

* Exit earlier from loop when a new Result is created

* 3) Make a cache of long[] name to String, to avoid `ByteBuffer.allocate`
* and creating new UTF-8 strings. I didn't profile, so it's just a guess
* that this map will be a bit faster. Although it's outside the main loop, so
* not a big difference ...;
* 4) Exit earlier from loop if a new entry was created.

* revert: Remove cache to city name

* As I was not able to make it faster... make it slower

As I was not able to make it faster ... so I'll make it slower,
because my current solution should *not* stay at the top, as it added
basically nothing.

* EduardoSaverin

UserName : EduardoSaverin
Total Time : 15.408
CPU : 8 Core (Apple M1 Pro)
RAM : 16GB

* Update CalculateAverage_EduardoSaverin.java

Removed ConcurrentHashMap with Reentrant Lock + HashMap. Since multiple threads causing problems.

* Combine <8 and 8-16 cases into one case.

* Adopt mask-based approach for the <16 length city fast path (idea of Van Phu Do).

* Slightly improved code layout.

* Update perf number.

* 1brc submission by godofwharf

* Fix prepare script

* Modify shebang

* Fix formatting

* Remove unused FastHashMap implementation

Co-authored-by: Giedrius D <d.giedrius@gmail.com>

* Initial chunked impl

* Bytes instead of chars

* Improved number parsing

* Custom hashmap

* Graal and some tuning

* Fix segmenting

* Fix casing

* Unsafe

* Inlining hash calc

* Improved loop

* Cleanup

* Speeding up equals

* Simplifying hash

* Replace concurrenthashmap with lock

* Small changes

* Script reorg

* Native

* Lots of inlining and improvements

* Add back length check

* Fixes

* Small changes

---------

Co-authored-by: Jamal Mulla <j.mulla@mwam.com>

* 1BRC breejesh

* Fix output

* Fix formatting

* Format and remove preview feature

* Optimize merge

* Revert "Optimize merge"

This reverts commit 28c9b4af29e1c90e992e8a1fd4f3258895782c2c.

---------

Co-authored-by: Breejesh Rathod <breejesh.rathod@m2pfintech.com>

* first release

* change constants to names

---------

Co-authored-by: Stephen Von Worley <von@von.io>

* slovdahl: First submission

* More JAVA_OPTS flags, 0.1s better locally