pouch-vs-local-storage-for-imports.js

const mapHistToStorageModel = async transformFn => {
    const histItems = await browser.history.search({ text: '', maxResults: 9999999, startTime: 0 })
    const urls = new Set()
    const storageItems = []
    histItems.forEach(item => {
        if (urls.has(item.url)) return
        urls.add(item.url)
        storageItems.push(transformFn(item))
    })
    return storageItems
}

async function histToLocalStorage() {
    const transformToStorageItem = histItem => ({ url: histItem.url, type: 'history' })

    const total = 'total time'
    const hist = 'mapping from history API'
    const serialize = 'serializing local storage data'
    const deserialize = 'parsing local storage data'
    const store = 'storing to local storage'
    const access = 'accessing from local storage'

    console.time(total)

    console.time(hist)
    const storageItems = await mapHistToStorageModel(transformToStorageItem)
    console.timeEnd(hist)

    console.time(serialize)
    const imports = JSON.stringify(storageItems)
    console.timeEnd(serialize)

    console.time(store)
    await browser.storage.local.set({ imports })
    console.timeEnd(store)

    console.time(access)
    const { imports: importsData } = await browser.storage.local.get('imports')
    console.timeEnd(access)

    console.time(deserialize)
    console.log(`Parsing ~${importsData.length} bytes`)
    const parsedImportsData = JSON.parse(importsData)
    console.timeEnd(deserialize)

    console.timeEnd(total)
}

async function histToPouch() {
    const transformToImportDoc = histItem => ({
        _id: `import/${histItem.id}`,
        url: histItem.url,
        type: 'history',
    })

    const total = 'total time'
    const hist = 'mapping from history API'
    const store = 'storing to pouch'
    const access = 'accessing from pouch'

    console.time(total)

    console.time(hist)
    const importDocs = await mapHistToStorageModel(transformToImportDoc)
    console.timeEnd(hist)

    console.time(store)
    await db.bulkDocs(importDocs)
    console.timeEnd(store)

    console.time(access)
    const { docs } = await db.find({ selector: { _id: { $gte: 'import/', $lte: 'import/\uffff' } } })
    console.timeEnd(access)

    console.timeEnd(total)

    console.log(`roughly ${JSON.stringify(docs).length} bytes`)
}