41 lines
1.1 KiB
JavaScript
41 lines
1.1 KiB
JavaScript
// this provides a weak-valued map to ensure we only have a single instance of an object per id, but can still be GC-ed
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let WeakValueMap
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try {
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let NativeWeakValueMap = require('weakvaluemap')
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let allInstances = []
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WeakValueMap = function() {
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let map = new NativeWeakValueMap()
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allInstances.push(map)
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return map
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}
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WeakValueMap.getStatus = function() {
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let mapStats = []
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for (let map of allInstances) {
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let size = 0
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let count = 0
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for (let key of map.keys()) {
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let value = map.get(key)
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size += value && value.approximateSize || 100
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count++
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}
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if (count > 0) {
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mapStats.push({
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name: map.name,
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size,
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count
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})
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}
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}
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return mapStats
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}
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} catch (error) {
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console.warn('No weak value map available, this can be used for development, but weak value maps should be enabled for production use', error.toString())
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WeakValueMap = Map
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WeakValueMap.getStatus = function() {
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return 'WeakValueMap failed to load'
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}
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WeakValueMap.prototype._keysAsArray = function() {
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return Array.from(this.keys())
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}
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}
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exports.WeakValueMap = WeakValueMap |
