• File size measurements show the distribution of size of files.
• Files are classified in four categories based on their size (lines of code): 1-100 (very small files), 101-200 (small files), 201-500 (medium size files), 501-1000 (long files), 1001+(very long files).
• It is a good practice to keep files small. Long files may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.

• There are 1,291 files with 124,932 lines of code.
• 14 very long files (20,314 lines of code)
• 15 long files (9,210 lines of code)
• 118 medium size files (35,309 lines of codeclsfd_ftr_w_mp_ins)
• 163 small files (22,768 lines of code)
• 981 very small files (37,331 lines of code)

There are 282 files with lines longer than 120 characters. In total, there are 1257 long lines.

File	# lines	# units	# long lines
orc part-00000-482d0e2c-7667-42bb-8750-64ecfe331d28-c000.snappy.orc in cpp/velox/benchmarks/data/bm_lineitem/orc	1151	-	161
local_engine_jni.cpp in cpp-ch/local-engine	1135	72	74
SerializedPlanParser.cpp in cpp-ch/local-engine/Parser	1971	46	67
OptimizedArrowColumnToCHColumn.cpp in cpp-ch/local-engine/Storages/ch_parquet	590	17	41
ReadBufferBuilder.cpp in cpp-ch/local-engine/Storages/SubstraitSource	596	19	25
SparkParseURL.cpp in cpp-ch/local-engine/Functions	555	34	24
AggregateRelParser.cpp in cpp-ch/local-engine/Parser	341	8	19
GraceMergingAggregatedStep.cpp in cpp-ch/local-engine/Operator	497	19	19
CHColumnToSparkRow.cpp in cpp-ch/local-engine/Parser	829	39	17
PartitionWriter.cpp in cpp-ch/local-engine/Shuffle	344	13	14
SerializedPlanParser.h in cpp-ch/local-engine/Parser	368	9	14
JoinRelParser.cpp in cpp-ch/local-engine/Parser	351	10	14
TpcMixin.java in tools/gluten-it/common/src/main/java/io/glutenproject/integration/tpc	126	3	14
SparkFunctionTupleElement.cpp in cpp-ch/local-engine/Functions	185	10	13
SparkFunctionHashingExtended.h in cpp-ch/local-engine/Functions	517	27	13
CHUtil.cpp in cpp-ch/local-engine/Common	694	32	13
WindowRelParser.cpp in cpp-ch/local-engine/Parser	328	9	11
orc lineitem.orc in cpp/velox/benchmarks/data/bm_lineitem/orc	62	-	11
SparkFunctionMakeDecimal.cpp in cpp-ch/local-engine/Functions	187	9	10
SparkFunctionGetJsonObject.h in cpp-ch/local-engine/Functions	322	13	10
StreamingAggregatingStep.cpp in cpp-ch/local-engine/Operator	270	9	10
SubstraitToVeloxPlanValidator.cc in cpp/velox/substrait	1086	27	10
SparkFunctionPositionUTF8.cpp in cpp-ch/local-engine/Functions	221	8	9
SparkRowToCHColumn.cpp in cpp-ch/local-engine/Parser	356	12	9
ExcelTextFormatFile.cpp in cpp-ch/local-engine/Storages/SubstraitSource	319	13	9
ShuffleSplitter.cpp in cpp-ch/local-engine/Shuffle	368	23	8
slice.cpp in cpp-ch/local-engine/Parser/scalar_function_parser	76	5	8
AggregateFunctionParser.cpp in cpp-ch/local-engine/Parser	156	5	8
AggregateFunctionParser.h in cpp-ch/local-engine/Parser	137	7	8
ExcelStringReader.cpp in cpp-ch/local-engine/Storages/Serializations	210	5	8
ExcelNumberReader.h in cpp-ch/local-engine/Storages/Serializations	416	6	8
FunctionsBloomFilter.h in cpp-ch/local-engine/Functions	179	9	7
SparkFunctionNextDay.cpp in cpp-ch/local-engine/Functions	263	12	7
SparkFunctionCheckDecimalOverflow.cpp in cpp-ch/local-engine/Functions	158	10	7
SelectorBuilder.cpp in cpp-ch/local-engine/Shuffle	372	11	7
SparkRowToCHColumn.h in cpp-ch/local-engine/Parser	310	24	7
sequence.cpp in cpp-ch/local-engine/Parser/scalar_function_parser	67	2	7
ProjectRelParser.cpp in cpp-ch/local-engine/Parser	152	2	7
GlutenSignalHandler.cpp in cpp-ch/local-engine/Common	338	11	7
SparkFunctionRegexpExtractAll.cpp in cpp-ch/local-engine/Functions	309	13	6
SparkFunctionTrim.cpp in cpp-ch/local-engine/Functions	142	8	6
RelParser.h in cpp-ch/local-engine/Parser	75	6	6
FunctionParser.h in cpp-ch/local-engine/Parser	86	6	6
NativeReader.cpp in cpp-ch/local-engine/Storages/IO	193	7	6
SubstraitFileSource.cpp in cpp-ch/local-engine/Storages/SubstraitSource	326	9	6
ParquetFormatFile.cpp in cpp-ch/local-engine/Storages/SubstraitSource	148	4	6
ExcelBoolReader.cpp in cpp-ch/local-engine/Storages/Serializations	152	3	6
AggregateFunctionGroupBloomFilter.h in cpp-ch/local-engine/AggregateFunctions	131	12	6
SparkRunModes.java in tools/gluten-it/common/src/main/java/io/glutenproject/integration/tpc/command	108	7	6
SparkFunctionStrToMap.cpp in cpp-ch/local-engine/Functions	134	9	5