kepler.gl
Version:
kepler.gl is a webgl based application to visualize large scale location data in the browser
132 lines (127 loc) • 12.4 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = quickInsertionSort;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
// SPDX-License-Identifier: MIT
// Copyright contributors to the kepler.gl project
/**
* Inplace quick insertion sorting algorithm for numeric values
* 1. using a stack to eliminate recursion
* 2. sorting inplace to reduce memory usage
* 3. using insertion sort for small partition sizes
* The original source code is from:
* https://www.measurethat.net/Benchmarks/Show/3549/0/javascript-sorting-algorithms
* https://quick.work/?page=view-blog&id=24
*
* @param arr
*/
function quickInsertionSort(arr) {
if (!arr || arr.length < 1) {
return;
}
var stack = [];
stack.push([0, arr.length, 2 * Math.floor(Math.log(arr.length) / Math.log(2))]);
while (stack.length > 0) {
var _stack = (0, _slicedToArray2["default"])(stack[stack.length - 1], 3),
start = _stack[0],
end = _stack[1],
depth = _stack[2];
stack.pop();
if (depth === 0) {
// for worst case of quick sort: too many partitions
shellSortBound(arr, start, end);
} else {
var pivot = Math.round((start + end) / 2);
var pivotNewIndex = inplaceQuicksortPartition(arr, start, end, pivot);
// more than 32 elements: faster to be sorted in QuickSort partition
// less than 32 elements: faster to be sorted in InsertionSort
if (end - pivotNewIndex > 16) {
stack.push([pivotNewIndex, end, depth - 1]);
}
if (pivotNewIndex - start > 16) {
stack.push([start, pivotNewIndex, depth - 1]);
}
}
}
insertionSort(arr);
}
/**
* shellsort is a generalization of insertion sort
* shellsort perform best on partially sorted array
* Don't use shellsort on array (>10k)
* @param arr
* @param start
* @param end
*
* Learn more about Shellsort at https://en.wikipedia.org/wiki/Shellsort
*/
function shellSortBound(arr, start, end) {
if (arr.length <= 1) return;
var inc = Math.round((start + end) / 2);
var i;
var j;
var t;
while (inc > start) {
for (i = inc; i < end; i++) {
t = arr[i];
j = i;
while (j >= inc && arr[j - inc] > t) {
arr[j] = arr[j - inc];
j -= inc;
}
arr[j] = t;
}
inc = Math.round((inc - start) / 2.2 + start);
}
}
/**
* Insertion sort
* @param arr
*/
function insertionSort(arr) {
for (var i = 1, l = arr.length; i < l; i++) {
var value = arr[i];
var j = void 0;
for (j = i - 1; j >= 0; j--) {
if (arr[j] <= value) break;
arr[j + 1] = arr[j];
}
arr[j + 1] = value;
}
}
/**
* In-place quick sort
* @param arr
* @param start
* @param end
* @param pivotIndex
* @returns number
*/
function inplaceQuicksortPartition(arr, start, end, pivotIndex) {
var i = start;
var j = end;
var pivot = arr[pivotIndex];
var partition = true;
while (partition) {
while (arr[i] < pivot) {
i++;
}
j--;
while (pivot < arr[j]) {
j--;
}
if (!(i < j)) {
return i;
}
// swap(arr, i, j);
var t = arr[i];
arr[i] = arr[j];
arr[j] = t;
i++;
}
return i;
}
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i < end; i++) {\n      t = arr[i];\n      j = i;\n      while (j >= inc && arr[j - inc] > t) {\n        arr[j] = arr[j - inc];\n        j -= inc;\n      }\n      arr[j] = t;\n    }\n    inc = Math.round((inc - start) / 2.2 + start);\n  }\n}\n\n/**\n * Insertion sort\n * @param arr\n */\nfunction insertionSort(arr: number[]) {\n  for (let i = 1, l = arr.length; i < l; i++) {\n    const value = arr[i];\n    let j;\n    for (j = i - 1; j >= 0; j--) {\n      if (arr[j] <= value) break;\n      arr[j + 1] = arr[j];\n    }\n    arr[j + 1] = value;\n  }\n}\n\n/**\n * In-place quick sort\n * @param arr\n * @param start\n * @param end\n * @param pivotIndex\n * @returns number\n */\nfunction inplaceQuicksortPartition(\n  arr: number[],\n  start: number,\n  end: number,\n  pivotIndex: number\n): number {\n  let i = start;\n  let j = end;\n  const pivot = arr[pivotIndex];\n  const partition = true;\n  while (partition) {\n    while (arr[i] < pivot) {\n      i++;\n    }\n    j--;\n    while (pivot < arr[j]) {\n      j--;\n    }\n    if (!(i < j)) {\n      return i;\n    }\n    // swap(arr, i, j);\n    const t = arr[i];\n    arr[i] = arr[j];\n    arr[j] = t;\n    i++;\n  }\n  return i;\n}\n"],"mappings":";;;;;;;;AAAA;AACA;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACe,SAASA,kBAAkBA,CAACC,GAAa,EAAQ;EAC9D,IAAI,CAACA,GAAG,IAAIA,GAAG,CAACC,MAAM,GAAG,CAAC,EAAE;IAC1B;EACF;EACA,IAAMC,KAAiB,GAAG,EAAE;EAC5BA,KAAK,CAACC,IAAI,CAAC,CAAC,CAAC,EAAEH,GAAG,CAACC,MAAM,EAAE,CAAC,GAAGG,IAAI,CAACC,KAAK,CAACD,IAAI,CAACE,GAAG,CAACN,GAAG,CAACC,MAAM,CAAC,GAAGG,IAAI,CAACE,GAAG,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;EAE/E,OAAOJ,KAAK,CAACD,MAAM,GAAG,CAAC,EAAE;IACvB,IAAAM,MAAA,OAAAC,eAAA,aAA4BN,KAAK,CAACA,KAAK,CAACD,MAAM,GAAG,CAAC,CAAC;MAA5CQ,KAAK,GAAAF,MAAA;MAAEG,GAAG,GAAAH,MAAA;MAAEI,KAAK,GAAAJ,MAAA;IACxBL,KAAK,CAACU,GAAG,CAAC,CAAC;IAEX,IAAID,KAAK,KAAK,CAAC,EAAE;MACf;MACAE,cAAc,CAACb,GAAG,EAAES,KAAK,EAAEC,GAAG,CAAC;IACjC,CAAC,MAAM;MACL,IAAMI,KAAK,GAAGV,IAAI,CAACW,KAAK,CAAC,CAACN,KAAK,GAAGC,GAAG,IAAI,CAAC,CAAC;MAC3C,IAAMM,aAAa,GAAGC,yBAAyB,CAACjB,GAAG,EAAES,KAAK,EAAEC,GAAG,EAAEI,KAAK,CAAC;MACvE;MACA;MACA,IAAIJ,GAAG,GAAGM,aAAa,GAAG,EAAE,EAAE;QAC5Bd,KAAK,CAACC,IAAI,CAAC,CAACa,aAAa,EAAEN,GAAG,EAAEC,KAAK,GAAG,CAAC,CAAC,CAAC;MAC7C;MACA,IAAIK,aAAa,GAAGP,KAAK,GAAG,EAAE,EAAE;QAC9BP,KAAK,CAACC,IAAI,CAAC,CAACM,KAAK,EAAEO,aAAa,EAAEL,KAAK,GAAG,CAAC,CAAC,CAAC;MAC/C;IACF;EACF;EACAO,aAAa,CAAClB,GAAG,CAAC;AACpB;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAASa,cAAcA,CAACb,GAAa,EAAES,KAAa,EAAEC,GAAW,EAAE;EACjE,IAAIV,GAAG,CAACC,MAAM,IAAI,CAAC,EAAE;EACrB,IAAIkB,GAAG,GAAGf,IAAI,CAACW,KAAK,CAAC,CAACN,KAAK,GAAGC,GAAG,IAAI,CAAC,CAAC;EACvC,IAAIU,CAAC;EACL,IAAIC,CAAC;EACL,IAAIC,CAAC;EAEL,OAAOH,GAAG,GAAGV,KAAK,EAAE;IAClB,KAAKW,CAAC,GAAGD,GAAG,EAAEC,CAAC,GAAGV,GAAG,EAAEU,CAAC,EAAE,EAAE;MAC1BE,CAAC,GAAGtB,GAAG,CAACoB,CAAC,CAAC;MACVC,CAAC,GAAGD,CAAC;MACL,OAAOC,CAAC,IAAIF,GAAG,IAAInB,GAAG,CAACqB,CAAC,GAAGF,GAAG,CAAC,GAAGG,CAAC,EAAE;QACnCtB,GAAG,CAACqB,CAAC,CAAC,GAAGrB,GAAG,CAACqB,CAAC,GAAGF,GAAG,CAAC;QACrBE,CAAC,IAAIF,GAAG;MACV;MACAnB,GAAG,CAACqB,CAAC,CAAC,GAAGC,CAAC;IACZ;IACAH,GAAG,GAAGf,IAAI,CAACW,KAAK,CAAC,CAACI,GAAG,GAAGV,KAAK,IAAI,GAAG,GAAGA,KAAK,CAAC;EAC/C;AACF;;AAEA;AACA;AACA;AACA;AACA,SAASS,aAAaA,CAAClB,GAAa,EAAE;EACpC,KAAK,IAAIoB,CAAC,GAAG,CAAC,EAAEG,CAAC,GAAGvB,GAAG,CAACC,MAAM,EAAEmB,CAAC,GAAGG,CAAC,EAAEH,CAAC,EAAE,EAAE;IAC1C,IAAMI,KAAK,GAAGxB,GAAG,CAACoB,CAAC,CAAC;IACpB,IAAIC,CAAC;IACL,KAAKA,CAAC,GAAGD,CAAC,GAAG,CAAC,EAAEC,CAAC,IAAI,CAAC,EAAEA,CAAC,EAAE,EAAE;MAC3B,IAAIrB,GAAG,CAACqB,CAAC,CAAC,IAAIG,KAAK,EAAE;MACrBxB,GAAG,CAACqB,CAAC,GAAG,CAAC,CAAC,GAAGrB,GAAG,CAACqB,CAAC,CAAC;IACrB;IACArB,GAAG,CAACqB,CAAC,GAAG,CAAC,CAAC,GAAGG,KAAK;EACpB;AACF;;AAEA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAASP,yBAAyBA,CAChCjB,GAAa,EACbS,KAAa,EACbC,GAAW,EACXe,UAAkB,EACV;EACR,IAAIL,CAAC,GAAGX,KAAK;EACb,IAAIY,CAAC,GAAGX,GAAG;EACX,IAAMI,KAAK,GAAGd,GAAG,CAACyB,UAAU,CAAC;EAC7B,IAAMC,SAAS,GAAG,IAAI;EACtB,OAAOA,SAAS,EAAE;IAChB,OAAO1B,GAAG,CAACoB,CAAC,CAAC,GAAGN,KAAK,EAAE;MACrBM,CAAC,EAAE;IACL;IACAC,CAAC,EAAE;IACH,OAAOP,KAAK,GAAGd,GAAG,CAACqB,CAAC,CAAC,EAAE;MACrBA,CAAC,EAAE;IACL;IACA,IAAI,EAAED,CAAC,GAAGC,CAAC,CAAC,EAAE;MACZ,OAAOD,CAAC;IACV;IACA;IACA,IAAME,CAAC,GAAGtB,GAAG,CAACoB,CAAC,CAAC;IAChBpB,GAAG,CAACoB,CAAC,CAAC,GAAGpB,GAAG,CAACqB,CAAC,CAAC;IACfrB,GAAG,CAACqB,CAAC,CAAC,GAAGC,CAAC;IACVF,CAAC,EAAE;EACL;EACA,OAAOA,CAAC;AACV","ignoreList":[]}