Following #65, we should add benchmarks for possible future performance investigations.
Feel free to add to the list of functions to benchmark.

• direct calls to the residual Helmholtz energy function given a StateHD (circumventing closure construction and cache) [Add benchmarks and Cargo profile using link-time optimization #89 ].
  • Helmholtz energy
  • first derivative using Dual64
  • second derivative using HyperDual64
  • third derivative using Dual3
• Properties of State (creating a State inside benchmark or manually clearing cache) [Add benchmarks and Cargo profile using link-time optimization #89]
• functions including algorithms / solver
  • PhaseEquilibrium: constructors
  • critical point
• DFT
  • surface tension
  • pores
• Python
  • identifying overhead

Notes

• Compare impact of compiler options
  • lto = "thin" versus lto = true
  • target-cpu=native
  • and more?