diff --git a/benchmark/README.md b/benchmark/README.md
index dc66bf16f..70040b074 100644
--- a/benchmark/README.md
+++ b/benchmark/README.md
@@ -1,49 +1,56 @@
-**2018-07-16** Latest results, using latest versions of modules:
+**2020-07-10** Latest results, using latest versions of modules and the fixed benchmark tool:
 
-    ├── async@2.6.1
+    ├── async@3.2.0
     ├── davy@1.3.0
-    ├── deferred@0.7.9
+    ├── deferred@0.7.11
     ├── kew@0.7.0
     ├── lie@3.3.0
     ├── optimist@0.6.1
-    ├── promise@8.0.1
+    ├── promise@8.1.0
     ├── q@1.5.1
-    ├── rsvp@4.8.3
-    ├── vow@0.4.17
+    ├── streamline@3.0.0
+    ├── streamline-runtime@2.0.1
+    ├── rsvp@4.8.5
+    ├── vow@0.4.20
     ├── when@3.7.8
 
+## Sequential benchmark
+
 bench doxbee-sequential `ls ./doxbee-sequential/*.js | sed -e 's|\.js||' | xargs node ./performance.js --p 1 --t 1 --n 10000`
 
     file                                    time(ms)  memory(MB)
-    callbacks-baseline                           162       28.12
-    callbacks-suguru03-neo-async-waterfall       195       42.39
-    promises-bluebird-generator                  199       40.23
-    callbacks-caolan-async-waterfall             225       46.36
-    promises-native-async-await                  245       57.39
-    promises-bluebird                            257       47.03
-    promises-lvivski-davy                        313       87.59
-    promises-cujojs-when                         318       64.34
-    promises-then-promise                        323       64.49
-    generators-tj-co                             334       58.03
-    promises-ecmascript6-native                  335       65.40
-    promises-tildeio-rsvp                        420       86.79
-    promises-calvinmetcalf-lie                   514      138.58
-    promises-dfilatov-vow                        629      135.28
-    promises-obvious-kew                         693      190.43
-    streamline-generators                        762       90.18
-    promises-medikoo-deferred                    781      149.33
-    observables-pozadi-kefir                     824      180.54
-    streamline-callbacks                        1088      114.73
-    observables-Reactive-Extensions-RxJS        1208      243.74
-    observables-caolan-highland                 3094      424.63
-    promises-kriskowal-q                        3505      367.13
-    observables-baconjs-bacon.js                5224      660.07
+    callbacks-baseline                           125       24.33
+    callbacks-suguru03-neo-async-waterfall       171       41.83
+    callbacks-caolan-async-waterfall             180       46.10
+    promises-native-async-await                  228       50.30
+    promises-bluebird-generator                  229       34.67
+    promises-lvivski-davy                        259       90.27
+    promises-bluebird                            273       47.95
+    generators-tj-co                             309       58.47
+    promises-ecmascript6-native                  323       64.30
+    promises-then-promise                        337       72.52
+    promises-cujojs-when                         349       61.88
+    promises-tildeio-rsvp                        423       84.26
+    promises-calvinmetcalf-lie                   559      127.08
+    promises-dfilatov-vow                        569      137.19
+    promises-obvious-kew                         687      126.44
+    observables-pozadi-kefir                     734      134.27
+    streamline-generators                        736       75.25
+    promises-medikoo-deferred                    785      124.33
+    observables-Reactive-Extensions-RxJS         958      236.98
+    streamline-callbacks                        1097      106.21
+    promises-kriskowal-q                        2459      535.71
+    observables-caolan-highland                 2567      549.15
+    observables-baconjs-bacon.js                3894      762.46
 
     Platform info:
-    Darwin 17.7.0 x64
-    Node.JS 10.6.0
-    V8 6.7.288.46-node.13
-    Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz × 4
+    Linux 5.4.44-1-MANJARO x64
+    Node.JS 14.2.0
+    V8 8.1.307.31-node.33
+    Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz × 4
+
+
+## Parallel benchmark
 
 bench parallel (`--p 25`)
 
@@ -52,24 +59,28 @@ results for 10000 parallel executions, 1 ms per I/O op `ls ./madeup-parallel/*.j
     results for 10000 parallel executions, 1 ms per I/O op
 
     file                                   time(ms)  memory(MB)
-    callbacks-baseline                          309       74.47
-    callbacks-suguru03-neo-async-parallel       374       84.18
-    promises-bluebird-generator                 455      106.49
-    promises-bluebird                           472       98.00
-    callbacks-caolan-async-parallel             510      119.34
-    promises-lvivski-davy                       671      163.84
-    promises-cujojs-when                        701      168.99
-    promises-native-async-await                1087      242.02
-    promises-tildeio-rsvp                      1237      344.17
-    promises-calvinmetcalf-lie                 1401      370.65
-    promises-ecmascript6-native                1509      242.91
-    promises-then-promise                      1533      303.89
-    promises-medikoo-deferred                  1923      334.75
-    promises-dfilatov-vow                      2534      534.80
-    promises-obvious-kew                       2623      306.68
+    callbacks-baseline                          266       81.63
+    callbacks-suguru03-neo-async-parallel       338       84.65
+    callbacks-caolan-async-parallel             449      113.75
+    promises-lvivski-davy                       461      157.35
+    promises-bluebird-generator                 488       93.39
+    promises-bluebird                           523      103.17
+    promises-cujojs-when                        638      153.63
+    promises-ecmascript6-native                 850      212.47
+    promises-native-async-await                 909      208.11
+    promises-then-promise                       945      231.95
+    generators-tj-co                            971      222.68
+    promises-tildeio-rsvp                       982      309.17
+    promises-calvinmetcalf-lie                  991      325.19
+    promises-medikoo-deferred                  1630      354.50
+    promises-dfilatov-vow                      1838      474.54
+    promises-obvious-kew                       1971      598.67
+    streamline-generators                      5382      858.13
+    streamline-callbacks                       8164     1089.96
 
     Platform info:
-    Darwin 17.7.0 x64
-    Node.JS 10.6.0
-    V8 6.7.288.46-node.13
-    Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz × 4
+    Linux 5.4.44-1-MANJARO x64
+    Node.JS 14.2.0
+    V8 8.1.307.31-node.33
+    Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz × 4
+
diff --git a/benchmark/package-lock.json b/benchmark/package-lock.json
index 4fd5c078d..c0732350d 100644
--- a/benchmark/package-lock.json
+++ b/benchmark/package-lock.json
@@ -5,9 +5,9 @@
   "requires": true,
   "dependencies": {
     "amdefine": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.0.tgz",
-      "integrity": "sha1-/RdHRwDLXMnCtwnwvp0jzjwZjDM="
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
+      "integrity": "sha1-SlKCrBZHKek2Gbz9OtFR+BfOkfU="
     },
     "ansi-regex": {
       "version": "2.1.1",
@@ -25,28 +25,44 @@
       "integrity": "sha1-5QNHYR1+aQlDIIu9r+vLwvuGbUY="
     },
     "async": {
-      "version": "2.6.1",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.1.tgz",
-      "integrity": "sha512-fNEiL2+AZt6AlAw/29Cr0UDe4sRAHCpEHh54WMz+Bb7QfNcFw4h3loofyJpLeQs4Yx7yuqu/2dLgM5hKOs6HlQ==",
-      "requires": {
-        "lodash": "4.17.10"
-      }
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.2.0.tgz",
+      "integrity": "sha512-TR2mEZFVOj2pLStYxLht7TyfuRzaydfpxr3k9RpHIzMgw7A64dzsdqCxH1WJyQdoe8T10nDXd9wnEigmiuHIZw=="
     },
     "babel-code-frame": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-code-frame/-/babel-code-frame-6.26.0.tgz",
       "integrity": "sha1-Y/1D99weO7fONZR9uP42mj9Yx0s=",
       "requires": {
-        "chalk": "1.1.3",
-        "esutils": "2.0.2",
-        "js-tokens": "3.0.2"
-      },
-      "dependencies": {
-        "js-tokens": {
-          "version": "3.0.2",
-          "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz",
-          "integrity": "sha1-mGbfOVECEw449/mWvOtlRDIJwls="
-        }
+        "chalk": "^1.1.3",
+        "esutils": "^2.0.2",
+        "js-tokens": "^3.0.2"
+      }
+    },
+    "babel-core": {
+      "version": "6.26.3",
+      "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.3.tgz",
+      "integrity": "sha512-6jyFLuDmeidKmUEb3NM+/yawG0M2bDZ9Z1qbZP59cyHLz8kYGKYwpJP0UwUKKUiTRNvxfLesJnTedqczP7cTDA==",
+      "requires": {
+        "babel-code-frame": "^6.26.0",
+        "babel-generator": "^6.26.0",
+        "babel-helpers": "^6.24.1",
+        "babel-messages": "^6.23.0",
+        "babel-register": "^6.26.0",
+        "babel-runtime": "^6.26.0",
+        "babel-template": "^6.26.0",
+        "babel-traverse": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "babylon": "^6.18.0",
+        "convert-source-map": "^1.5.1",
+        "debug": "^2.6.9",
+        "json5": "^0.5.1",
+        "lodash": "^4.17.4",
+        "minimatch": "^3.0.4",
+        "path-is-absolute": "^1.0.1",
+        "private": "^0.1.8",
+        "slash": "^1.0.0",
+        "source-map": "^0.5.7"
       }
     },
     "babel-generator": {
@@ -54,42 +70,14 @@
       "resolved": "https://registry.npmjs.org/babel-generator/-/babel-generator-6.26.1.tgz",
       "integrity": "sha512-HyfwY6ApZj7BYTcJURpM5tznulaBvyio7/0d4zFOeMPUmfxkCjHocCuoLa2SAGzBI8AREcH3eP3758F672DppA==",
       "requires": {
-        "babel-messages": "6.23.0",
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "detect-indent": "4.0.0",
-        "jsesc": "1.3.0",
-        "lodash": "4.17.10",
-        "source-map": "0.5.7",
-        "trim-right": "1.0.1"
-      },
-      "dependencies": {
-        "detect-indent": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/detect-indent/-/detect-indent-4.0.0.tgz",
-          "integrity": "sha1-920GQ1LN9Docts5hnE7jqUdd4gg=",
-          "requires": {
-            "repeating": "2.0.1"
-          }
-        },
-        "lodash": {
-          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
-        },
-        "repeating": {
-          "version": "2.0.1",
-          "resolved": "https://registry.npmjs.org/repeating/-/repeating-2.0.1.tgz",
-          "integrity": "sha1-UhTFOpJtNVJwdSf7q0FdvAjQbdo=",
-          "requires": {
-            "is-finite": "1.0.2"
-          }
-        },
-        "source-map": {
-          "version": "0.5.7",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.5.7.tgz",
-          "integrity": "sha1-igOdLRAh0i0eoUyA2OpGi6LvP8w="
-        }
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "detect-indent": "^4.0.0",
+        "jsesc": "^1.3.0",
+        "lodash": "^4.17.4",
+        "source-map": "^0.5.7",
+        "trim-right": "^1.0.1"
       }
     },
     "babel-helper-call-delegate": {
@@ -97,10 +85,10 @@
       "resolved": "https://registry.npmjs.org/babel-helper-call-delegate/-/babel-helper-call-delegate-6.24.1.tgz",
       "integrity": "sha1-7Oaqzdx25Bw0YfiL/Fdb0Nqi340=",
       "requires": {
-        "babel-helper-hoist-variables": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-hoist-variables": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-define-map": {
@@ -108,17 +96,10 @@
       "resolved": "https://registry.npmjs.org/babel-helper-define-map/-/babel-helper-define-map-6.26.0.tgz",
       "integrity": "sha1-pfVtq0GiX5fstJjH66ypgZ+Vvl8=",
       "requires": {
-        "babel-helper-function-name": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "lodash": "4.17.10"
-      },
-      "dependencies": {
-        "lodash": {
-          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
-        }
+        "babel-helper-function-name": "^6.24.1",
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "lodash": "^4.17.4"
       }
     },
     "babel-helper-function-name": {
@@ -126,11 +107,11 @@
       "resolved": "https://registry.npmjs.org/babel-helper-function-name/-/babel-helper-function-name-6.24.1.tgz",
       "integrity": "sha1-00dbjAPtmCQqJbSDUasYOZ01gKk=",
       "requires": {
-        "babel-helper-get-function-arity": "6.24.1",
-        "babel-runtime": "6.26.0",
-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-get-function-arity": "^6.24.1",
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-get-function-arity": {
@@ -138,8 +119,8 @@
       "resolved": "https://registry.npmjs.org/babel-helper-get-function-arity/-/babel-helper-get-function-arity-6.24.1.tgz",
       "integrity": "sha1-j3eCqpNAfEHTqlCQj4mwMbG2hT0=",
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-hoist-variables": {
@@ -147,8 +128,8 @@
       "resolved": "https://registry.npmjs.org/babel-helper-hoist-variables/-/babel-helper-hoist-variables-6.24.1.tgz",
       "integrity": "sha1-HssnaJydJVE+rbyZFKc/VAi+enY=",
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-optimise-call-expression": {
@@ -156,8 +137,8 @@
       "resolved": "https://registry.npmjs.org/babel-helper-optimise-call-expression/-/babel-helper-optimise-call-expression-6.24.1.tgz",
       "integrity": "sha1-96E0J7qfc/j0+pk8VKl4gtEkQlc=",
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helper-regex": {
@@ -165,16 +146,9 @@
       "resolved": "https://registry.npmjs.org/babel-helper-regex/-/babel-helper-regex-6.26.0.tgz",
       "integrity": "sha1-MlxZ+QL4LyS3T6zu0DY5VPZJXnI=",
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-types": "6.26.0",
-        "lodash": "4.17.10"
-      },
-      "dependencies": {
-        "lodash": {
-          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
-        }
+        "babel-runtime": "^6.26.0",
+        "babel-types": "^6.26.0",
+        "lodash": "^4.17.4"
       }
     },
     "babel-helper-replace-supers": {
@@ -182,12 +156,12 @@
       "resolved": "https://registry.npmjs.org/babel-helper-replace-supers/-/babel-helper-replace-supers-6.24.1.tgz",
       "integrity": "sha1-v22/5Dk40XNpohPKiov3S2qQqxo=",
       "requires": {
-        "babel-helper-optimise-call-expression": "6.24.1",
-        "babel-messages": "6.23.0",
-        "babel-runtime": "6.26.0",
-        "babel-template": "6.26.0",
-        "babel-traverse": "6.26.0",
-        "babel-types": "6.26.0"
+        "babel-helper-optimise-call-expression": "^6.24.1",
+        "babel-messages": "^6.23.0",
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1",
+        "babel-traverse": "^6.24.1",
+        "babel-types": "^6.24.1"
       }
     },
     "babel-helpers": {
@@ -195,8 +169,8 @@
       "resolved": "https://registry.npmjs.org/babel-helpers/-/babel-helpers-6.24.1.tgz",
       "integrity": "sha1-NHHenK7DiOXIUOWX5Yom3fN2ArI=",
       "requires": {
-        "babel-runtime": "6.26.0",
-        "babel-template": "6.26.0"
+        "babel-runtime": "^6.22.0",
+        "babel-template": "^6.24.1"
       }
     },
     "babel-messages": {
@@ -204,7 +178,7 @@
       "resolved": "https://registry.npmjs.org/babel-messages/-/babel-messages-6.23.0.tgz",
       "integrity": "sha1-8830cDhYA1sqKVHG7F7fbGLyYw4=",
       "requires": {
-        "babel-runtime": "6.26.0"
+        "babel-runtime": "^6.22.0"
       }
     },
     "babel-plugin-check-es2015-constants": {
@@ -212,7 +186,7 @@
       "resolved": "https://registry.npmjs.org/babel-plugin-check-es2015-constants/-/babel-plugin-check-es2015-constants-6.22.0.tgz",
       "integrity": "sha1-NRV7EBQm/S/9PaP3XH0ekYNbv4o=",
       "requires": {
-        "babel-runtime": "6.26.0"
+        "babel-runtime": "^6.22.0"
       }
     },
     "babel-plugin-streamline": {
@@ -220,69 +194,8 @@
       "resolved": "https://registry.npmjs.org/babel-plugin-streamline/-/babel-plugin-streamline-2.0.26.tgz",
       "integrity": "sha1-U7TK+6jRRYa65TYDoci6AX60HyE=",
       "requires": {
-        "babel-core": "6.26.3",
-        "colors": "1.1.2"
-      },
-      "dependencies": {
-        "babel-core": {
-          "version": "6.26.3",
-          "resolved": "https://registry.npmjs.org/babel-core/-/babel-core-6.26.3.tgz",
-          "integrity": "sha512-6jyFLuDmeidKmUEb3NM+/yawG0M2bDZ9Z1qbZP59cyHLz8kYGKYwpJP0UwUKKUiTRNvxfLesJnTedqczP7cTDA==",
-          "requires": {
-            "babel-code-frame": "6.26.0",
-            "babel-generator": "6.26.1",
-            "babel-helpers": "6.24.1",
-            "babel-messages": "6.23.0",
-            "babel-register": "6.26.0",
-            "babel-runtime": "6.26.0",
-            "babel-template": "6.26.0",
-            "babel-traverse": "6.26.0",
-            "babel-types": "6.26.0",
-            "babylon": "6.18.0",
-            "convert-source-map": "1.5.1",
-            "debug": "2.6.9",
-            "json5": "0.5.1",
-            "lodash": "4.17.10",
-            "minimatch": "3.0.4",
-            "path-is-absolute": "1.0.1",
-            "private": "0.1.8",
-            "slash": "1.0.0",
-            "source-map": "0.5.7"
-          }
-        },
-        "babylon": {
-          "version": "6.18.0",
-          "resolved": "https://registry.npmjs.org/babylon/-/babylon-6.18.0.tgz",
-          "integrity": "sha512-q/UEjfGJ2Cm3oKV71DJz9d25TPnq5rhBVL2Q4fA5wcC3jcrdn7+SssEybFIxwAvvP+YCsCYNKughoF33GxgycQ=="
-        },
-        "json5": {
-          "version": "0.5.1",
-          "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
-          "integrity": "sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE="
-        },
-        "lodash": {
-          "version": "4.17.10",
-          "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.10.tgz",
-          "integrity": "sha512-UejweD1pDoXu+AD825lWwp4ZGtSwgnpZxb3JDViD7StjQz+Nb/6l093lx4OQ0foGWNRoc19mWy7BzL+UAK2iVg=="
-        },
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-          "integrity": "sha512-ZXDgpd6MyTP08luK5z3M/fJ7yqNxXEg2PjeG/RAOVFKLIeftb0Y+YBl/Vhu2WdvY6B8jsicfAiRL/XsZBUFlsw==",
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/streamline-runtime/-/streamline-runtime-2.0.1.tgz",
+          "integrity": "sha512-o60ekfMZO1A8+n0fmkGIeyKd4Rzp0jBfZ2CEGmeNNVX4pn4xk4Iztekd0g8Y+T4EnoYqfr7dOv3KK8TUwsmOuA==",
           "requires": {
-            "colors": "1.1.2",
-            "fibers": "2.0.2",
-            "regenerator-runtime": "0.10.3"
+            "colors": "^1.4.0",
+            "fibers": "^4.0.2",
+            "regenerator-runtime": "^0.13.3"
           }
         }
       }
     },
     "streamline-runtime": {
-      "version": "1.1.15",
-      "resolved": "https://registry.npmjs.org/streamline-runtime/-/streamline-runtime-1.1.15.tgz",
-      "integrity": "sha512-ZXDgpd6MyTP08luK5z3M/fJ7yqNxXEg2PjeG/RAOVFKLIeftb0Y+YBl/Vhu2WdvY6B8jsicfAiRL/XsZBUFlsw==",
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/streamline-runtime/-/streamline-runtime-2.0.1.tgz",
+      "integrity": "sha512-o60ekfMZO1A8+n0fmkGIeyKd4Rzp0jBfZ2CEGmeNNVX4pn4xk4Iztekd0g8Y+T4EnoYqfr7dOv3KK8TUwsmOuA==",
       "requires": {
-        "colors": "1.1.2",
-        "fibers": "2.0.2",
-        "regenerator-runtime": "0.10.3"
+        "colors": "^1.4.0",
+        "fibers": "^4.0.2",
+        "regenerator-runtime": "^0.13.3"
+      },
+      "dependencies": {
+        "regenerator-runtime": {
+          "version": "0.13.5",
+          "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.5.tgz",
+          "integrity": "sha512-ZS5w8CpKFinUzOwW3c83oPeVXoNsrLsaCoLtJvAClH135j/R77RuymhiSErhm2lKcwSCIpmvIWSbDkIfAqKQlA=="
+        }
       }
     },
     "strip-ansi": {
@@ -1215,7 +1043,7 @@
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
       "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
       "requires": {
-        "ansi-regex": "2.1.1"
+        "ansi-regex": "^2.0.0"
       }
     },
     "subsequent": {
@@ -1234,12 +1062,12 @@
       "integrity": "sha1-f17oI66AUgfACvLfSoTsP8+lcLQ="
     },
     "timers-ext": {
-      "version": "0.1.5",
-      "resolved": "https://registry.npmjs.org/timers-ext/-/timers-ext-0.1.5.tgz",
-      "integrity": "sha512-tsEStd7kmACHENhsUPaxb8Jf8/+GZZxyNFQbZD07HQOyooOa6At1rQqjffgvg7n+dxscQa9cjjMdWhJtsP2sxg==",
+      "version": "0.1.7",
+      "resolved": "https://registry.npmjs.org/timers-ext/-/timers-ext-0.1.7.tgz",
+      "integrity": "sha512-b85NUNzTSdodShTIbky6ZF02e8STtVVfD+fu4aXXShEELpozH+bCpJLYMPZbsABN2wDH7fJpqIoXxJpzbf0NqQ==",
       "requires": {
-        "es5-ext": "0.10.45",
-        "next-tick": "1.0.0"
+        "es5-ext": "~0.10.46",
+        "next-tick": "1"
       }
     },
     "to-fast-properties": {
@@ -1252,15 +1080,20 @@
       "resolved": "https://registry.npmjs.org/trim-right/-/trim-right-1.0.1.tgz",
       "integrity": "sha1-yy4SAwZ+DI3h9hQJS5/kVwTqYAM="
     },
+    "type": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/type/-/type-1.2.0.tgz",
+      "integrity": "sha512-+5nt5AAniqsCnu2cEQQdpzCAh33kVx8n0VoFidKpB1dVVLAN/F+bgVOqOJqOnEnrhp222clB5p3vUlD+1QAnfg=="
+    },
     "typescript": {
-      "version": "2.9.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-2.9.2.tgz",
-      "integrity": "sha512-Gr4p6nFNaoufRIY4NMdpQRNmgxVIGMs4Fcu/ujdYk3nAZqk7supzBE9idmvfZIlH/Cuj//dvi+019qEue9lV0w=="
+      "version": "3.9.6",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.6.tgz",
+      "integrity": "sha512-Pspx3oKAPJtjNwE92YS05HQoY7z2SFyOpHo9MqJor3BXAGNaPUs83CuVp9VISFkSjyRfiTpmKuAYGJB7S7hOxw=="
     },
     "vow": {
-      "version": "0.4.17",
-      "resolved": "https://registry.npmjs.org/vow/-/vow-0.4.17.tgz",
-      "integrity": "sha512-A3/9bWFqf6gT0jLR4/+bT+IPTe1mQf+tdsW6+WI5geP9smAp8Kbbu4R6QQCDKZN/8TSCqTlXVQm12QliB4rHfg=="
+      "version": "0.4.20",
+      "resolved": "https://registry.npmjs.org/vow/-/vow-0.4.20.tgz",
+      "integrity": "sha512-YYoSYXUYABqY08D/WrjcWJxJSErcILRRTQpcPyUc0SFfgIPKSUFzVt7u1HC3TXGJZM/qhsSjCLNQstxqf7asgQ=="
     },
     "when": {
       "version": "3.7.8",
diff --git a/benchmark/package.json b/benchmark/package.json
index 54bcae1f1..765ea7a83 100644
--- a/benchmark/package.json
+++ b/benchmark/package.json
@@ -4,20 +4,20 @@
   "description": "Compare the performance and code of multiple async patterns",
   "main": "perf.js",
   "dependencies": {
-    "async": "^2.6.1",
+    "async": "^3.2.0",
     "davy": "^1.3.0",
-    "deferred": "^0.7.9",
+    "deferred": "^0.7.11",
     "kew": "^0.7.0",
     "lie": "^3.3.0",
-    "neo-async": "^2.5.1",
+    "neo-async": "^2.6.2",
     "optimist": "^0.6.1",
-    "promise": "^8.0.1",
+    "promise": "^8.1.0",
     "q": "^1.5.1",
-    "rsvp": "^4.8.3",
-    "streamline": "^2.1.3",
-    "streamline-runtime": "^1.1.15",
+    "rsvp": "^4.8.5",
+    "streamline": "^3.0.0",
+    "streamline-runtime": "^2.0.1",
     "text-table": "^0.2.0",
-    "vow": "^0.4.17",
+    "vow": "^0.4.20",
     "when": "^3.7.8"
   },
   "devDependencies": {},
diff --git a/benchmark/performance.js b/benchmark/performance.js
index 9e63e7d8c..b734787a7 100644
--- a/benchmark/performance.js
+++ b/benchmark/performance.js
@@ -56,9 +56,8 @@ var perf = module.exports = function(args, done) {
     function warmup() {
         warmedUp++
         if( warmedUp === tot ) {
-            start = Date.now();
-
             memStart = process.memoryUsage().rss;
+            start = Date.now();
             for (var k = 0, kn = args.n; k < kn; ++k)
                 fn(k, 'b', 'c', cb);
             memMax = process.memoryUsage().rss;
@@ -70,11 +69,12 @@ var perf = module.exports = function(args, done) {
             ++errs;
             lastErr = err;
         }
-        memMax = Math.max(memMax, process.memoryUsage().rss);
         if (!--times) {
             fn.end && fn.end();
+            var time = Date.now() - start;
+            memMax = Math.max(memMax, process.memoryUsage().rss);
             done(null, {
-                time: Date.now() - start,
+                time,
                 mem: (memMax - memStart)/1024/1024,
                 errors: errs,
                 lastErr: lastErr ? lastErr.stack : null