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Q: Why does Clover use Source Code Instrumentation?Source code instrumentation is the most powerful, flexible and accurate way to provide code coverage analysis.The following table compares different methods of obtaining code coverage and their relative benefits:

Possible feature

JVMDI/PI

Bytecode instrumentation

Source code instrumentation

Gathers method coverage

yes

yes

yes

Gathers statement coverage

line only

indirectly

yes

Gathers branch coverage

indirectly

indirectly

yes

Can work without source

yes

yes

no

Requires separate build

no

no

yes

Requires specialised runtime

yes

yes

no

Gathers source metrics

no

no

yes

View coverage data inline with source

not accurate

not accurate

yes

Source level directives to control coverage gathering

no

no

yes

Control which entities are reported on

limited

limited

yes

Compilation time

no impact

variable

variable

Runtime performace

high impact

variable

variable

Container friendly

no

no

yes

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