• 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 971 files with 78,592 lines of code.
• 3 very long files (7,989 lines of code)
• 11 long files (6,849 lines of code)
• 58 medium size files (17,689 lines of codeclsfd_ftr_w_mp_ins)
• 130 small files (18,586 lines of code)
• 769 very small files (27,479 lines of code)

There are 324 files with lines longer than 120 characters. In total, there are 1239 long lines.

File	# lines	# units	# long lines
java_pipeline_spec.rb in logstash-core/spec/logstash	1374	20	50
elasticsearch_source_spec.rb in x-pack/spec/config_management	652	-	47
AbstractPipelineExt.java in logstash-core/src/main/java/org/logstash/execution	747	64	47
elasticsearch_options_spec.rb in x-pack/spec/helpers	386	-	24
metric_store_spec.rb in logstash-core/spec/logstash/instrument	228	-	22
monitoring.rb in x-pack/lib/monitoring	245	30	21
agent_spec.rb in logstash-core/spec/logstash	469	1	21
elasticsearch_source.rb in x-pack/lib/config_management	244	21	19
JavaKeyStore.java in logstash-core/src/main/java/org/logstash/secret/store/backend	348	14	16
SecretStoreCli.java in logstash-core/src/main/java/org/logstash/secret/cli	293	17	15
settings.rb in logstash-core/lib/logstash	678	98	15
util_spec.rb in spec/unit/plugin_manager	66	-	12
webserver.rb in logstash-core/lib/logstash	187	16	12
extension.rb in x-pack/lib/config_management	43	2	11
metrics_spec.rb in logstash-core/spec/logstash/agent	186	2	11
cloud_setting_id_spec.rb in logstash-core/spec/logstash/util	182	-	11
event_spec.rb in logstash-core/spec/logstash	318	-	11
agent.rb in logstash-core/lib/logstash	459	49	11
install_spec.rb in spec/unit/plugin_manager	64	-	10
manager.rb in x-pack/lib/geoip_database_management	241	24	10
Queue.java in logstash-core/src/main/java/org/logstash/ackedqueue	552	43	10
DSL.java in logstash-core/src/main/java/org/logstash/config/ir	252	60	10
ExtendedFlowMetric.java in logstash-core/src/main/java/org/logstash/instrument/metrics	216	24	10
PipelineIndicator.java in logstash-core/src/main/java/org/logstash/health	267	21	10
StreamReadConstraintsUtil.java in logstash-core/src/main/java/org/logstash/jackson	132	12	10
local.rb in logstash-core/lib/logstash/config/source	165	17	10
json_spec.rb in logstash-core/spec/logstash	156	-	9
converge_spec.rb in logstash-core/spec/logstash/agent	228	-	9
PluginConfigSpec.java in logstash-core/src/main/java/co/elastic/logstash/api	162	29	9
environment.rb in logstash-core/lib/logstash	188	18	9
license_reader_spec.rb in x-pack/spec/license_checker	183	-	8
multiple_pipelines_spec.rb in x-pack/qa/integration/management	163	1	8
secretstore_spec.rb in logstash-core/spec/logstash/util	55	-	8
matchers.rb in logstash-core/spec/support	138	2	8
Page.java in logstash-core/src/main/java/org/logstash/ackedqueue	174	26	8
DeadLetterQueueWriter.java in logstash-core/src/main/java/org/logstash/common/io	589	57	8
mixin.rb in logstash-core/lib/logstash/config	397	2	8
JvmOptionsParser.java in tools/jvm-options-parser/src/main/java/org/logstash/launchers	270	20	8
internal_pipeline_source.rb in x-pack/lib/monitoring	86	7	7
cgroup_spec.rb in logstash-core/spec/logstash/instrument/periodic_poller	252	-	7
CompiledPipeline.java in logstash-core/src/main/java/org/logstash/config/ir	362	29	7
Graph.java in logstash-core/src/main/java/org/logstash/config/ir/graph	313	50	7
PluginFactoryExt.java in logstash-core/src/main/java/org/logstash/plugins/factory	302	20	7
config_ast.rb in logstash-core/lib/logstash/config	434	49	7
registry.rb in logstash-core/lib/logstash/plugins	229	32	7
http_client_spec.rb in spec/unit/plugin_manager/utils	104	-	6
elasticsearch_options.rb in x-pack/lib/helpers	131	6	6
settings_spec.rb in logstash-core/spec/logstash	300	-	6
ConfigCompiler.java in logstash-core/src/main/java/org/logstash/config/ir	78	8	6
ExpressionSubstitution.java in logstash-core/src/main/java/org/logstash/config/ir/expression	35	1	6