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lts/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py

Summary

Maintainability
F
1 wk
Test Coverage

Function bytecode_offset_generator has a Cognitive Complexity of 12 (exceeds 5 allowed). Consider refactoring.
Open

def bytecode_offset_generator(perf_stream, bytecode_name):
  skip_until_end_of_chain = False
  bytecode_symbol = "BytecodeHandler:" + bytecode_name;

  for line in perf_stream:
Severity: Minor
Found in lts/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py - About 1 hr to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function bytecode_disassembly_generator has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.
Open

def bytecode_disassembly_generator(ignition_codegen, bytecode_name):
  name_string = "name = " + bytecode_name
  for line in ignition_codegen:
    if line.startswith(name_string):
      break
Severity: Minor
Found in lts/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py - About 45 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function print_disassembly_annotation has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

def print_disassembly_annotation(offset_counts, bytecode_disassembly):
  total = sum(offset_counts.values())
  offsets = sorted(offset_counts, reverse=True)
  def next_offset():
    return offsets.pop() if offsets else -1
Severity: Minor
Found in lts/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Identical blocks of code found in 2 locations. Consider refactoring.
Open

Severity: Major
Found in lts/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py and 1 other location - About 1 wk to fix
current/deps/v8/tools/ignition/linux_perf_bytecode_annotate.py on lines 0..177

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 746.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

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