Clojure

JVMFunctionalDynamicGC

A modern Lisp on the JVM — immutable data structures by default and a strong concurrency story with atoms, refs, and STM. Niche but valued in finance and data processing for its simplicity and REPL-driven development. Among the most concise languages in benchmarks, with minimal syntax and a prefix notation that eliminates operator precedence.

Quality

Concept Distribution

Safety4.3 / 5

Memory

Compile-time

JVM GC + immutable data prevent memory corruption

Null

Runtime

nil is idiomatic; NPE possible but JVM catches it

Data Races

Runtime

Atoms/refs/STM prevent most races, but Java interop risks

Overflow

Compile-time

Arbitrary-precision by default (BigInt auto-promotion)

Coercion

Runtime

Some implicit numeric widening in arithmetic

Compile-timeRuntimeOpt-inNone

How we score

Expressivenessavg across benchmarks

Lines

8

Verbosity

182

Ceremony

0

Surface Area65 concepts

16 reserved keywords

Types

8

Control

6

Functions

14

OOP/Data

6

Memory

2

Concurrency

12

Metaprog

12

Errors

5

How we measure

Explicitness

25% explicit75% implicit

25% of 65 concepts have dedicated keyword syntax. The rest are learned through documentation and practice.

AI Readiness

Type Coverage

Dynamic

LLM Tokens

74

Tok/Line

9.3

Lower tokens = cheaper API calls. Higher type coverage = more for AI to work with.

Solutions

View all Clojure solutions in the problem pages.