Summary: It takes few seconds for ts-node to start even for small scripts. TS_NODE_TRANSPILE_ONLY env var makes loading much faster ~100-200ms.
Reviewed By: mweststrate
Differential Revision: D20769639
fbshipit-source-id: 9b09a4e128e6b9c9651de98d8193b1d3a8f42b64
