Accuracy and Efficiency
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      **See also:**
      Examples:  accuracy

* Precision and Self-Consistency

  * SCF

  * Numerical Integration

  * Density fitting

  * Hartree-Fock RI scheme

  * MBPT scheme

  * Dependency (basis set, fit set)

* Basis Set Superposition Error (BSSE)

* Control of Program Flow

  * Limited execution

  * Skipping

  * Ignore checks

* Technical Settings

  * Memory usage

  * Direct SCF: recalculation of data

  * Vector length

  * Tails and old gradients

  * Linear scaling

  * All Points

  * Full Fock

  * Save info
