From f9bf23dc430e9fc65bfe46fce19209abff582fa9 Mon Sep 17 00:00:00 2001
From: Rich Harris <richard.a.harris@gmail.com>
Date: Sun, 19 Aug 2018 18:52:01 -0400
Subject: [PATCH] use cheap-watch instead of chokidar (#364)

---
 package-lock.json | 331 +++++++++++++++++++++++++++++++++++++---------
 package.json      |   2 +-
 src/api/dev.ts    |  63 +++++----
 3 files changed, 313 insertions(+), 83 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index f611828b6..04cea0ed0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -411,6 +411,7 @@
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
       "integrity": "sha512-5teOsQWABXHHBFP9y3skS5P3d/WfWXpv3FUpy+LorMrNYaT9pI4oLMQX7jzQ2KklNpGpWHzdCXTDT2Y3XGlZBw==",
+      "dev": true,
       "requires": {
         "micromatch": "^3.1.4",
         "normalize-path": "^2.1.1"
@@ -434,17 +435,20 @@
     "arr-diff": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
-      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA="
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
+      "dev": true
     },
     "arr-flatten": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/arr-flatten/-/arr-flatten-1.1.0.tgz",
-      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg=="
+      "integrity": "sha512-L3hKV5R/p5o81R7O02IGnwpDmkp6E982XhtbuwSe3O4qOtMMMtodicASA1Cny2U+aCXcNpml+m4dPsvsJ3jatg==",
+      "dev": true
     },
     "arr-union": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/arr-union/-/arr-union-3.1.0.tgz",
-      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ="
+      "integrity": "sha1-45sJrqne+Gao8gbiiK9jkZuuOcQ=",
+      "dev": true
     },
     "array-filter": {
       "version": "0.0.1",
@@ -494,7 +498,8 @@
     "array-unique": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
-      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg="
+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
+      "dev": true
     },
     "arrify": {
       "version": "1.0.1",
@@ -557,12 +562,14 @@
     "assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
-      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c="
+      "integrity": "sha1-WWZ/QfrdTyDMvCu5a41Pf3jsA2c=",
+      "dev": true
     },
     "async-each": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/async-each/-/async-each-1.0.1.tgz",
-      "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0="
+      "integrity": "sha1-GdOGodntxufByF04iu28xW0zYC0=",
+      "dev": true
     },
     "asynckit": {
       "version": "0.4.0",
@@ -573,7 +580,8 @@
     "atob": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/atob/-/atob-2.1.2.tgz",
-      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg=="
+      "integrity": "sha512-Wm6ukoaOGJi/73p/cl2GvLjTI5JM1k/O14isD73YML8StrH/7/lRFgmg8nICZgD3bZZvjwCGxtMOD3wWNAu8cg==",
+      "dev": true
     },
     "aws-sign2": {
       "version": "0.7.0",
@@ -625,12 +633,14 @@
     "balanced-match": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
-      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
+      "dev": true
     },
     "base": {
       "version": "0.11.2",
       "resolved": "https://registry.npmjs.org/base/-/base-0.11.2.tgz",
       "integrity": "sha512-5T6P4xPgpp0YDFvSWwEZ4NoE3aM4QBQXDzmVbraCkFj8zHM+mba8SyqB5DbZWyR7mYHo6Y7BdQo3MoA4m0TeQg==",
+      "dev": true,
       "requires": {
         "cache-base": "^1.0.1",
         "class-utils": "^0.3.5",
@@ -645,6 +655,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/define-property/-/define-property-1.0.0.tgz",
           "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
+          "dev": true,
           "requires": {
             "is-descriptor": "^1.0.0"
           }
@@ -653,6 +664,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
           "integrity": "sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -661,6 +673,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
           "integrity": "sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -669,6 +682,7 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
           "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
+          "dev": true,
           "requires": {
             "is-accessor-descriptor": "^1.0.0",
             "is-data-descriptor": "^1.0.0",
@@ -702,7 +716,8 @@
     "binary-extensions": {
       "version": "1.11.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-1.11.0.tgz",
-      "integrity": "sha1-RqoXUftqL5PuXmibsQh9SxTGwgU="
+      "integrity": "sha1-RqoXUftqL5PuXmibsQh9SxTGwgU=",
+      "dev": true
     },
     "bluebird": {
       "version": "3.5.1",
@@ -746,6 +761,7 @@
       "version": "1.1.11",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
       "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
       "requires": {
         "balanced-match": "^1.0.0",
         "concat-map": "0.0.1"
@@ -755,6 +771,7 @@
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/braces/-/braces-2.3.2.tgz",
       "integrity": "sha512-aNdbnj9P8PjdXU4ybaWLK2IF3jc/EoDYbC7AazW6to3TRsfXxscC9UXOB5iDiEQrkyIbWp2SLQda4+QAa7nc3w==",
+      "dev": true,
       "requires": {
         "arr-flatten": "^1.1.0",
         "array-unique": "^0.3.2",
@@ -772,6 +789,7 @@
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
+          "dev": true,
           "requires": {
             "is-extendable": "^0.1.0"
           }
@@ -926,6 +944,7 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/cache-base/-/cache-base-1.0.1.tgz",
       "integrity": "sha512-AKcdTnFSWATd5/GCPRxr2ChwIJ85CeyrEyjRHlKxQ56d4XJMGym0uAiKn0xbLOGOl3+yRpOTi484dVCEc5AUzQ==",
+      "dev": true,
       "requires": {
         "collection-visit": "^1.0.0",
         "component-emitter": "^1.2.1",
@@ -1021,10 +1040,17 @@
       "integrity": "sha1-tUc7M9yXxCTl2Y3IfVXU2KKci/I=",
       "dev": true
     },
+    "cheap-watch": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/cheap-watch/-/cheap-watch-0.3.0.tgz",
+      "integrity": "sha512-5i7VOOgjZgxOA51L+Y6hFYsSLt2llTmOv+/91QUZgQdOzxTBqnVn9k4XTQEP7TrNBF0aI0SmHezm1wjbjsAUrA==",
+      "dev": true
+    },
     "chokidar": {
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.0.4.tgz",
       "integrity": "sha512-z9n7yt9rOvIJrMhvDtDictKrkFHeihkNl6uWMmZlmL6tJtX9Cs+87oK+teBx+JIgzvbX3yZHT3eF8vpbDxHJXQ==",
+      "dev": true,
       "requires": {
         "anymatch": "^2.0.0",
         "async-each": "^1.0.0",
@@ -1076,6 +1102,7 @@
       "version": "0.3.6",
       "resolved": "https://registry.npmjs.org/class-utils/-/class-utils-0.3.6.tgz",
       "integrity": "sha512-qOhPa/Fj7s6TY8H8esGu5QNpMMQxz79h+urzrNYN6mn+9BnxlDGf5QZ+XeCDsxSjPqsSR56XOZOJmpeurnLMeg==",
+      "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "define-property": "^0.2.5",
@@ -1087,6 +1114,7 @@
           "version": "0.2.5",
           "resolved": "https://registry.npmjs.org/define-property/-/define-property-0.2.5.tgz",
           "integrity": "sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=",
+          "dev": true,
           "requires": {
             "is-descriptor": "^0.1.0"
           }
@@ -1145,6 +1173,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/collection-visit/-/collection-visit-1.0.0.tgz",
       "integrity": "sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=",
+      "dev": true,
       "requires": {
         "map-visit": "^1.0.0",
         "object-visit": "^1.0.0"
@@ -1194,7 +1223,8 @@
     "component-emitter": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.2.1.tgz",
-      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY="
+      "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
+      "dev": true
     },
     "compressible": {
       "version": "2.0.14",
@@ -1223,7 +1253,8 @@
     "concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
-      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+      "dev": true
     },
     "concat-stream": {
       "version": "1.6.2",
@@ -1299,12 +1330,14 @@
     "copy-descriptor": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/copy-descriptor/-/copy-descriptor-0.1.1.tgz",
-      "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40="
+      "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=",
+      "dev": true
     },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
-      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
+      "dev": true
     },
     "create-ecdh": {
       "version": "4.0.3",
@@ -1407,6 +1440,7 @@
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
       "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "dev": true,
       "requires": {
         "ms": "2.0.0"
       }
@@ -1420,7 +1454,8 @@
     "decode-uri-component": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU="
+      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "dev": true
     },
     "deep-defaults": {
       "version": "1.0.4",
@@ -1481,6 +1516,7 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/define-property/-/define-property-2.0.2.tgz",
       "integrity": "sha512-jwK2UV4cnPpbcG7+VRARKTZPUWowwXA8bzH5NP6ud0oeAxyYPuGZUAC7hMugpCdz4BeSZl2Dl9k66CHJ/46ZYQ==",
+      "dev": true,
       "requires": {
         "is-descriptor": "^1.0.2",
         "isobject": "^3.0.1"
@@ -1490,6 +1526,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
           "integrity": "sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -1498,6 +1535,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
           "integrity": "sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -1506,6 +1544,7 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
           "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
+          "dev": true,
           "requires": {
             "is-accessor-descriptor": "^1.0.0",
             "is-data-descriptor": "^1.0.0",
@@ -2020,6 +2059,7 @@
       "version": "2.1.4",
       "resolved": "https://registry.npmjs.org/expand-brackets/-/expand-brackets-2.1.4.tgz",
       "integrity": "sha1-t3c14xXOMPa27/D4OwQVGiJEliI=",
+      "dev": true,
       "requires": {
         "debug": "^2.3.3",
         "define-property": "^0.2.5",
@@ -2034,6 +2074,7 @@
           "version": "0.2.5",
           "resolved": "https://registry.npmjs.org/define-property/-/define-property-0.2.5.tgz",
           "integrity": "sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=",
+          "dev": true,
           "requires": {
             "is-descriptor": "^0.1.0"
           }
@@ -2042,6 +2083,7 @@
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
+          "dev": true,
           "requires": {
             "is-extendable": "^0.1.0"
           }
@@ -2155,6 +2197,7 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-3.0.2.tgz",
       "integrity": "sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=",
+      "dev": true,
       "requires": {
         "assign-symbols": "^1.0.0",
         "is-extendable": "^1.0.1"
@@ -2164,6 +2207,7 @@
           "version": "1.0.1",
           "resolved": "https://registry.npmjs.org/is-extendable/-/is-extendable-1.0.1.tgz",
           "integrity": "sha512-arnXMxT1hhoKo9k1LZdmlNyJdDDfy2v0fXjFlmok4+i8ul/6WlbVge9bhM74OpNPQPMGUToDtz+KXa1PneJxOA==",
+          "dev": true,
           "requires": {
             "is-plain-object": "^2.0.4"
           }
@@ -2185,6 +2229,7 @@
       "version": "2.0.4",
       "resolved": "https://registry.npmjs.org/extglob/-/extglob-2.0.4.tgz",
       "integrity": "sha512-Nmb6QXkELsuBr24CJSkilo6UHHgbekK5UiZgfE6UHD3Eb27YC6oD+bhcT+tJ6cl8dmsgdQxnWlcry8ksBIBLpw==",
+      "dev": true,
       "requires": {
         "array-unique": "^0.3.2",
         "define-property": "^1.0.0",
@@ -2200,6 +2245,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/define-property/-/define-property-1.0.0.tgz",
           "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
+          "dev": true,
           "requires": {
             "is-descriptor": "^1.0.0"
           }
@@ -2208,6 +2254,7 @@
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
+          "dev": true,
           "requires": {
             "is-extendable": "^0.1.0"
           }
@@ -2216,6 +2263,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-1.0.0.tgz",
           "integrity": "sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -2224,6 +2272,7 @@
           "version": "1.0.0",
           "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-1.0.0.tgz",
           "integrity": "sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==",
+          "dev": true,
           "requires": {
             "kind-of": "^6.0.0"
           }
@@ -2232,6 +2281,7 @@
           "version": "1.0.2",
           "resolved": "https://registry.npmjs.org/is-descriptor/-/is-descriptor-1.0.2.tgz",
           "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
+          "dev": true,
           "requires": {
             "is-accessor-descriptor": "^1.0.0",
             "is-data-descriptor": "^1.0.0",
@@ -2314,6 +2364,7 @@
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-4.0.0.tgz",
       "integrity": "sha1-1USBHUKPmOsGpj3EAtJAPDKMOPc=",
+      "dev": true,
       "requires": {
         "extend-shallow": "^2.0.1",
         "is-number": "^3.0.0",
@@ -2325,6 +2376,7 @@
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
+          "dev": true,
           "requires": {
             "is-extendable": "^0.1.0"
           }
@@ -2412,7 +2464,8 @@
     "for-in": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/for-in/-/for-in-1.0.2.tgz",
-      "integrity": "sha1-gQaNKVqBQuwKxybG4iAMMPttXoA="
+      "integrity": "sha1-gQaNKVqBQuwKxybG4iAMMPttXoA=",
+      "dev": true
     },
     "for-own": {
       "version": "0.1.5",
@@ -2450,6 +2503,7 @@
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/fragment-cache/-/fragment-cache-0.2.1.tgz",
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@@ -2726,11 +2813,13 @@
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@@ -2848,6 +2951,7 @@
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-      "integrity": "sha1-YrEQ4omkcUGOPsNqYX1HLjAd/Ik="
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-      "integrity": "sha1-qIwCU1eR8C7TfHahueqXc8gz+MI="
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@@ -3627,12 +3770,14 @@
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     "source-map-resolve": {
       "version": "0.5.2",
       "resolved": "https://registry.npmjs.org/source-map-resolve/-/source-map-resolve-0.5.2.tgz",
       "integrity": "sha512-MjqsvNwyz1s0k81Goz/9vRBe9SZdB09Bdw+/zYyO+3CuPk6fouTaxscHkgtE8jKvf01kVfl8riHzERQ/kefaSA==",
+      "dev": true,
       "requires": {
         "atob": "^2.1.1",
         "decode-uri-component": "^0.2.0",
@@ -6151,7 +6344,8 @@
     "source-map-url": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/source-map-url/-/source-map-url-0.4.0.tgz",
-      "integrity": "sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM="
+      "integrity": "sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=",
+      "dev": true
     },
     "spdx-correct": {
       "version": "3.0.0",
@@ -6204,6 +6398,7 @@
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/split-string/-/split-string-3.1.0.tgz",
       "integrity": "sha512-NzNVhJDYpwceVVii8/Hu6DKfD2G+NrQHlS/V/qgv763EYudVwEcMQNxd2lh+0VrUByXN/oJkl5grOhYWvQUYiw==",
+      "dev": true,
       "requires": {
         "extend-shallow": "^3.0.0"
       }
@@ -6271,6 +6466,7 @@
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/static-extend/-/static-extend-0.1.2.tgz",
       "integrity": "sha1-YICcOcv/VTNyJv1eC1IPNB8ftcY=",
+      "dev": true,
       "requires": {
         "define-property": "^0.2.5",
         "object-copy": "^0.1.0"
@@ -6280,6 +6476,7 @@
           "version": "0.2.5",
           "resolved": "https://registry.npmjs.org/define-property/-/define-property-0.2.5.tgz",
           "integrity": "sha1-w1se+RjsPJkPmlvFe+BKrOxcgRY=",
+          "dev": true,
           "requires": {
             "is-descriptor": "^0.1.0"
           }
@@ -6373,6 +6570,7 @@
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
       "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "dev": true,
       "requires": {
         "safe-buffer": "~5.1.0"
       }
@@ -6571,6 +6769,7 @@
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/to-object-path/-/to-object-path-0.3.0.tgz",
       "integrity": "sha1-KXWIt7Dn4KwI4E5nL4XB9JmeF68=",
+      "dev": true,
       "requires": {
         "kind-of": "^3.0.2"
       },
@@ -6579,6 +6778,7 @@
           "version": "3.2.2",
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
           "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
+          "dev": true,
           "requires": {
             "is-buffer": "^1.1.5"
           }
@@ -6589,6 +6789,7 @@
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/to-regex/-/to-regex-3.0.2.tgz",
       "integrity": "sha512-FWtleNAtZ/Ki2qtqej2CXTOayOH9bHDQF+Q48VpWyDXjbYxA4Yz8iDB31zXOBUlOHHKidDbqGVrTUvQMPmBGBw==",
+      "dev": true,
       "requires": {
         "define-property": "^2.0.2",
         "extend-shallow": "^3.0.2",
@@ -6600,6 +6801,7 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-2.1.1.tgz",
       "integrity": "sha1-fIDBe53+vlmeJzZ+DU3VWQFB2zg=",
+      "dev": true,
       "requires": {
         "is-number": "^3.0.0",
         "repeat-string": "^1.6.1"
@@ -6777,6 +6979,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
       "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
+      "dev": true,
       "requires": {
         "arr-union": "^3.1.0",
         "get-value": "^2.0.6",
@@ -6788,6 +6991,7 @@
           "version": "2.0.1",
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
+          "dev": true,
           "requires": {
             "is-extendable": "^0.1.0"
           }
@@ -6796,6 +7000,7 @@
           "version": "0.4.3",
           "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
           "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
+          "dev": true,
           "requires": {
             "extend-shallow": "^2.0.1",
             "is-extendable": "^0.1.1",
@@ -6833,6 +7038,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
       "integrity": "sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=",
+      "dev": true,
       "requires": {
         "has-value": "^0.3.1",
         "isobject": "^3.0.0"
@@ -6842,6 +7048,7 @@
           "version": "0.3.1",
           "resolved": "https://registry.npmjs.org/has-value/-/has-value-0.3.1.tgz",
           "integrity": "sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=",
+          "dev": true,
           "requires": {
             "get-value": "^2.0.3",
             "has-values": "^0.1.4",
@@ -6852,6 +7059,7 @@
               "version": "2.1.0",
               "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
               "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
+              "dev": true,
               "requires": {
                 "isarray": "1.0.0"
               }
@@ -6861,14 +7069,16 @@
         "has-values": {
           "version": "0.1.4",
           "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
-          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E="
+          "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
+          "dev": true
         }
       }
     },
     "upath": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/upath/-/upath-1.1.0.tgz",
-      "integrity": "sha512-bzpH/oBhoS/QI/YtbkqCg6VEiPYjSZtrHQM6/QnJS6OL9pKUFLqb3aFh4Scvwm45+7iAgiMkLhSbaZxUqmrprw=="
+      "integrity": "sha512-bzpH/oBhoS/QI/YtbkqCg6VEiPYjSZtrHQM6/QnJS6OL9pKUFLqb3aFh4Scvwm45+7iAgiMkLhSbaZxUqmrprw==",
+      "dev": true
     },
     "upper-case": {
       "version": "1.1.3",
@@ -6895,7 +7105,8 @@
     "urix": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
-      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI="
+      "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
+      "dev": true
     },
     "url": {
       "version": "0.11.0",
@@ -6928,7 +7139,8 @@
     "use": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/use/-/use-3.1.1.tgz",
-      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ=="
+      "integrity": "sha512-cwESVXlO3url9YWlFW/TA9cshCEhtu7IKJ/p5soJ/gGpj7vbvFrAY/eIioQ6Dw23KjZhYgiIo8HOs1nQ2vr/oQ==",
+      "dev": true
     },
     "util": {
       "version": "0.10.4",
@@ -6942,7 +7154,8 @@
     "util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
-      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8=",
+      "dev": true
     },
     "utils-merge": {
       "version": "1.0.1",
diff --git a/package.json b/package.json
index e510c58e2..493df49c8 100644
--- a/package.json
+++ b/package.json
@@ -19,7 +19,6 @@
     "test": "test"
   },
   "dependencies": {
-    "chokidar": "^2.0.4",
     "html-minifier": "^3.5.16",
     "source-map-support": "^0.5.6",
     "tslib": "^1.9.1"
@@ -30,6 +29,7 @@
     "@types/mocha": "^5.2.5",
     "@types/node": "^10.7.1",
     "@types/rimraf": "^2.0.2",
+    "cheap-watch": "^0.3.0",
     "compression": "^1.7.1",
     "cookie": "^0.3.1",
     "devalue": "^1.0.4",
diff --git a/src/api/dev.ts b/src/api/dev.ts
index 9b6797d24..68711c3e2 100644
--- a/src/api/dev.ts
+++ b/src/api/dev.ts
@@ -119,21 +119,30 @@ class Watcher extends EventEmitter {
 		this.dev_server = new DevServer(dev_port);
 
 		this.filewatchers.push(
-			watch_files(locations.routes(), ['add', 'unlink'], () => {
-				const routes = create_routes();
-				create_main_manifests({ routes, dev_port });
-
-				try {
+			watch_dir(
+				locations.routes(),
+				({ path: file, stats }) => {
+					if (stats.isDirectory()) {
+						return path.basename(file)[0] !== '_';
+					}
+					return true;
+				},
+				() => {
 					const routes = create_routes();
 					create_main_manifests({ routes, dev_port });
-				} catch (err) {
-					this.emit('error', <events.ErrorEvent>{
-						message: err.message
-					});
+
+					try {
+						const routes = create_routes();
+						create_main_manifests({ routes, dev_port });
+					} catch (err) {
+						this.emit('error', <events.ErrorEvent>{
+							message: err.message
+						});
+					}
 				}
-			}),
+			),
 
-			watch_files(`${locations.app()}/template.html`, ['change'], () => {
+			fs.watch(`${locations.app()}/template.html`, () => {
 				this.dev_server.send({
 					action: 'reload'
 				});
@@ -453,24 +462,32 @@ class DevServer {
 
 function noop() {}
 
-function watch_files(pattern: string, events: string[], callback: () => void) {
-	let watcher;
+function watch_dir(
+	dir: string,
+	filter: ({ path, stats }: { path: string, stats: fs.Stats }) => boolean,
+	callback: () => void
+) {
+	let watch;
+	let closed = false;
 
-	import('chokidar').then(({ default: chokidar }) => {
+	import('cheap-watch').then(CheapWatch => {
 		if (closed) return;
 
-		watcher = chokidar.watch(pattern, {
-			persistent: true,
-			ignoreInitial: true,
-			disableGlobbing: true
-		});
+		watch = new CheapWatch({ dir, filter, debounce: 50 });
 
-		events.forEach(event => {
-			watcher.on(event, callback);
+		watch.on('+', ({ isNew }) => {
+			if (isNew) callback();
 		});
+
+		watch.on('-', callback);
+
+		watch.init();
 	});
 
 	return {
-		close: () => watcher && watcher.close()
+		close: () => {
+			if (watch) watch.close();
+			closed = true;
+		}
 	};
-}
+}
\ No newline at end of file