broccoli/dist/utils/slow-trees.js

Fast client-side asset builder

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = printSlowNodes;
const calculate_summary_1 = __importDefault(require("./calculate-summary"));
function ellipsize(string, desiredLength) {
    if (string.length > desiredLength) {
        return string.slice(0, desiredLength - 3) + '...';
    }
    else {
        return string;
    }
}
function pad(str, len, char, dir) {
    if (!char) {
        char = ' ';
    }
    if (len + 1 >= str.length)
        switch (dir) {
            case 'left': {
                str = Array(len + 1 - str.length).join(char) + str;
                break;
            }
            case 'both': {
                const padlen = len - str.length;
                const right = Math.ceil(padlen / 2);
                const left = padlen - right;
                str = Array(left + 1).join(char) + str + Array(right + 1).join(char);
                break;
            }
            default: {
                str = str + Array(len + 1 - str.length).join(char);
            }
        }
    return str;
}
function printSlowNodes(tree, factor, ui) {
    try {
        const summary = (0, calculate_summary_1.default)(tree);
        const pcThreshold = factor || 0.05;
        const msThreshold = pcThreshold * summary.totalTime;
        const cumulativeLogLines = [];
        const MAX_NAME_CELL_LENGTH = 45;
        const MAX_VALUE_CELL_LENGTH = 20;
        for (let i = 0; i < summary.groupedNodes.length; i++) {
            const group = summary.groupedNodes[i];
            let averageStr;
            if (group.totalSelfTime > msThreshold) {
                if (group.count > 1) {
                    averageStr = ' (' + Math.floor(group.averageSelfTime) + ' ms)';
                }
                else {
                    averageStr = '';
                }
                const countStr = ` (${group.count}) `;
                const nameStr = ellipsize(group.name, MAX_NAME_CELL_LENGTH - countStr.length);
                const timeColumn = pad(Math.floor(group.totalSelfTime) + 'ms' + averageStr, MAX_VALUE_CELL_LENGTH);
                const nameColumn = pad(nameStr + countStr, MAX_NAME_CELL_LENGTH);
                cumulativeLogLines.push(`${nameColumn} | ${timeColumn}`);
            }
        }
        cumulativeLogLines.unshift(pad('', MAX_NAME_CELL_LENGTH, '-') + '-+-' + pad('', MAX_VALUE_CELL_LENGTH, '-'));
        cumulativeLogLines.unshift(pad('Slowest Nodes (totalTime >= ' + pcThreshold * 100 + '%)', MAX_NAME_CELL_LENGTH) +
            ' | ' +
            pad('Total (avg)', MAX_VALUE_CELL_LENGTH));
        ui.writeLine('\n' + cumulativeLogLines.join('\n') + '\n');
    }
    catch (e) {
        ui.writeLine('Error when printing slow nodes', 'ERROR');
        ui.writeError(e);
    }
}
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