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BangleApps
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gpstrek - Be a bit smarter about caching

master
Martin Boonk 2023-05-27 18:15:37 +02:00
parent f268596c19
commit a1c5142ecc
1 changed files with 36 additions and 18 deletions
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54
apps/gpstrek/app.js
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@ -80,14 +80,42 @@ let parseWaypointWithElevationAndName = function(filename, offset, result){
let cache = {}; let cache = {};
let cachedOffsets = []; let cachedOffsets = [];
let getEntry = function(filename, offset, result){ let getFromCache = function(filename, offset, result){
if (offset < 0) return offset; if(filename == cache.filename && cache[offset]) {
if(cache.filename != filename) cache = {};
if(filename && cache[offset]) {
Object.assign(result, cache[offset]); Object.assign(result, cache[offset]);
result.access = Date.now(); result.access = Date.now();
return offset + cache[offset].fileLength; return offset + cache[offset].fileLength;
} }
return offset;
};
let cacheCleanup = function (){
if (SETTINGS.cacheMinFreeMem){
while (cachedOffsets.length > 0 && process.memory(false).free < SETTINGS.cacheMinFreeMem){
cache[cachedOffsets.shift()] = undefined;
}
}
if (SETTINGS.cacheMaxEntries){
while (cachedOffsets.length > SETTINGS.cacheMaxEntries){
cache[cachedOffsets.shift()] = undefined;
}
}
};
let cacheAdd = function (filename, result) {
cacheCleanup();
if(cache.filename != filename) {
cache = {};
cache.filename = filename;
}
cache[result.fileOffset] = result;
cachedOffsets.push(result.fileOffset);
};
let getEntry = function(filename, offset, result, noCaching){
if (offset < 0) return offset;
let cacheOffset = getFromCache(filename, offset, result);
if (cacheOffset != offset) return cacheOffset;
result.fileOffset = offset; result.fileOffset = offset;
let type = STORAGE.read(filename, offset++, 1); let type = STORAGE.read(filename, offset++, 1);
if (type == "") return -1; if (type == "") return -1;
@ -111,17 +139,9 @@ let getEntry = function(filename, offset, result){
offset++; offset++;
result.fileLength = offset - result.fileOffset; result.fileLength = offset - result.fileOffset;
cache[result.fileOffset] = result; if (!noCaching && (SETTINGS.cacheMaxEntries || SETTINGS.cacheMinFreeMem)){
cachedOffsets.push(result.fileOffset); cacheAdd(filename, result);
if (SETTINGS.cacheMinFreeMem && process.memory(false).free < SETTINGS.cacheMinFreeMem){
if (cachedOffsets.length > 0) cache[cachedOffsets.shift()] = undefined;
} }
if (SETTINGS.cacheMaxEntries){
while (cachedOffsets.length > SETTINGS.cacheMaxEntries){
cache[cachedOffsets.shift()] = undefined;
}
}
cache.filename = filename;
return offset; return offset;
}; };
@ -870,7 +890,7 @@ let loadRouteData = function(filename, progressMonitor){
if (createIndexFile) if (createIndexFile)
writeUint32(indexFileName, trfHash, 0, indexFileSize); writeUint32(indexFileName, trfHash, 0, indexFileSize);
while ((scanOffset = getEntry(filename, scanOffset, waypoint)) > 0) { while ((scanOffset = getEntry(filename, scanOffset, waypoint, true)) > 0) {
if (routeInfo.count % 5 == 0) progressMonitor(scanOffset, "Loading", size); if (routeInfo.count % 5 == 0) progressMonitor(scanOffset, "Loading", size);
if (lastSeenWaypoint){ if (lastSeenWaypoint){
routeInfo.length += distance(lastSeenWaypoint, waypoint); routeInfo.length += distance(lastSeenWaypoint, waypoint);
@ -952,7 +972,6 @@ let prev = function(route){
}; };
let lastMirror; let lastMirror;
let cachedLast;
let getLast = function(route){ let getLast = function(route){
let wp = {}; let wp = {};
@ -960,9 +979,8 @@ let getLast = function(route){
if (route.mirror) getEntry(route.filename, route.indexToOffset[0], wp); if (route.mirror) getEntry(route.filename, route.indexToOffset[0], wp);
if (!route.mirror) getEntry(route.filename, route.indexToOffset[route.count - 1], wp); if (!route.mirror) getEntry(route.filename, route.indexToOffset[route.count - 1], wp);
lastMirror = route.mirror; lastMirror = route.mirror;
cachedLast = wp;
} }
return cachedLast; return wp;
}; };
let removeMenu = function(){ let removeMenu = function(){