Added fetch concurrency.

config/default.js

@@ -45,6 +45,7 @@ module.exports = {
         limit: 1000,
         avoidDuplicates: true,
         retries: 3,
+        concurrency: 10,
         watch: {
             schedule: '*/30 * * * *',
         },

src/app.js

@@ -3,6 +3,7 @@
 const config = require('config');
 const Snoowrap = require('snoowrap');
 const fs = require('fs-extra');
+const Promise = require('bluebird');
 const exiftool = require('node-exiftool');
 const exiftoolBin = require('dist-exiftool');
 const cron = require('node-cron');
@@ -69,7 +70,8 @@ async function getCompleteUserPosts() {
 }
 
 function fetchSavePosts(userPosts, ep) {
-    return Promise.all(Object.values(userPosts).map(user => fetchSaveContent(user, ep, args)));
+    // don't map to apply concurrency limit and reduce network stress
+    return Promise.reduce(Object.values(userPosts), (acc, user) => fetchSaveContent(user, ep, args), null);
 }
 
 async function initApp() {

src/curate/posts.js

@@ -36,7 +36,7 @@ function report(curatedPosts, indexed, user, args) {
             `Ignoring ${afterIndexedCount} posts newer than the ${args.beforeIndexed} indexed post (${indexed[args.beforeIndexed].id}, ${indexed[args.beforeIndexed].date}) for '${user.name}'`
         );
     }
-};
+}
 
 function curatePost(acc, post, user, index, indexed, ignoreIds, processed, args) {
     const host = dissectLink(post.url);

src/fetch/content.js

@@ -73,6 +73,8 @@ async function fetchSaveContent(user, ep, args) {
         }, []);
 
         return post;
+    }, {
+        concurrency: config.fetch.concurrency,
     });
 
     return writeToIndex(posts, profilePaths, user);

src/save/writeToIndex.js

@@ -10,24 +10,6 @@ async function writeToIndex(posts, profilePaths, user) {
     const filename = interpolate(config.library.index.file, user, null, false);
     const now = new Date();
 
-    /*
-    // Individual posts are wrapped in [] to get a YAML array value for each individual item, allowing them to be joined manually with a newline
-    // between each entry to improve human readability of the index while maintaining a valid YAML list
-    const originalEntries = user.indexed.original.map(entry => yaml.safeDump([entry]));
-    const newAndUpdatedEntries = posts.concat(user.indexed.updated).map(post => yaml.safeDump([{
-        id: post.id,
-        subreddit: post.subreddit,
-        permalink: post.permalink,
-        url: post.url,
-        hostId: post.host.id,
-        date: post.datetime,
-        indexed: now,
-        title: post.title,
-    }]));
-
-    const entries = newAndUpdatedEntries.concat(originalEntries).join('\n');
-    */
-
     const newAndUpdatedEntries = posts.concat(user.indexed.updated).map(post => ({
         id: post.id,
         subreddit: post.subreddit,