title: iOS: Cost of asset format
body: <p>In the previous places of employment I have used
  to supply @3x png assets dodging @2x,
  in the new place folks use pdfs to dodge <em>multiple assets per image</em> semisoft(?) requirement.</p>
  <p>My understanding is that single @3x png is still cheaper than a pdf (exported from Figma in case it matters any)</p>
  <p>What are the pros and cons of each method
  of supplying assets?</p>
  <pre><code>1. lazy approach: @3x.png only
  2. @2x &amp; @3x (texture interpolation is better? faster?)
  3. pdf
  </code></pre>
  <p>Bonus question: it would be interesting to know if SVG is mapped into CoreGraphics/CoreAnimation and what's that cost of THAT too.
  Thanks!</p>