Very slow SPI on ESP32?

About twice as fast in software. Bummer about the hardware speed.

var spi = new SPI();
spi.setup({sck:D18, mosi:D23, baud: 4000000});
var g = require("ILI9341").connect(spi, D26, D27, D5, function() {
  g.clear();
  g.drawString("Hello",0,0);
  g.setFontVector(20);
  g.setColor(0,0.5,1);
  g.drawString("Espruino",0,10);
});