小编Oka*_*ias的帖子

我想解析MaxMind GeoIP2数据库的两个CSV文件,根据列进行一些连接并将结果合并到一个输出文件中.

我使用标准的CSV ruby​​库,它很慢.我认为它试图将所有文件加载到内存中.

block_file = File.read(block_path)
block_csv   = CSV.parse(block_file, :headers => true) 
location_file = File.read(location_path)
location_csv = CSV.parse(location_file, :headers => true)


CSV.open(output_path, "wb",
    :write_headers=> true,
    :headers => ["geoname_id","Y","Z"] ) do |csv|


    block_csv.each do |block_row|
    puts "#{block_row['geoname_id']}"

        location_csv.each do |location_row|
            if (block_row['geoname_id'] === location_row['geoname_id'])
                puts " match :"    
                csv << [block_row['geoname_id'],block_row['Y'],block_row['Z']]
                break location_row
            end
        end

    end

是否有另一个ruby库支持chuncks中的处理？

block_csv是800MB, location_csv是100MB.