Try a sample:
6502 ASM
cc65 — mul.s
ARM64 ASM
ARM — memcpy.S
C
Linux Kernel — rbtree.c
C
Redis — dict.c
C
curl — transfer.c
C
FFmpeg — h264dec.c
C
Git — commit.c
C
Nginx — ngx_http_core_module.c
C
SQLite — select.c
C++
llama.cpp — llama.cpp
C++
V8 — execution.cc
Clojure
Metabase — query_processor.clj
COBOL
IBM — fxsort.cbl
D
Phobos — algorithm/sorting.d
Dart
Flutter — framework.dart
Elixir
Phoenix — router.ex
Erlang
RabbitMQ — rabbit_channel.erl
Fortran
LAPACK — dgesv.f
Go
Go runtime — malloc.go
Go
Kubernetes — schedule_one.go
Haskell
Pandoc — Markdown.hs
Java
OpenJDK — HashMap.java
Java
Elasticsearch — QueryBuilders.java
JavaScript
Node.js — streams/readable.js
JavaScript
React — ReactFiber.js
Julia
Julia — base/array.jl
Kotlin
Kotlin — KClasses.kt
Lua
Neovim — lsp/client.lua
MIPS ASM
Linux Kernel — memcpy.S
Nim
Nim — compiler/parser.nim
OCaml
Flow — type_inference_js.ml
Perl
Git — git-send-email.perl
PHP
Laravel — Eloquent/Model.php
PowerPC ASM
Linux Kernel — memcpy_64.S
Progress ABL
Progress JSDO — Customer.cls
Python
Django — expressions.py
Python
PyTorch — autograd/function.py
Python
TensorFlow — keras/training.py
R
ggplot2 — geom-point.R
RISC-V ASM
Linux Kernel — memcpy.S
Ruby
Rails — query_methods.rb
Ruby
Homebrew — formula.rb
Rust
rustc — parser/expr.rs
s390 ASM
Linux Kernel — mem.S
Scala
Apache Spark — RDD.scala
SPARC ASM
Linux Kernel — memcpy.S
Swift
Swift stdlib — Array.swift
TypeScript
TypeScript — visitorPublic.ts
TypeScript
Vue.js — reactivity/effect.ts
x86-64 ASM
glibc — memmove-vec.S
Zig
Zig stdlib — mem.zig