Link Header Parsing Crystal Lang

Console

crystal ./src/test.cr --release
{"hub" => "https://api.twitch.tv/helix/webhooks/hub",
 "self" => "https://api.twitch.tv/helix/users/follows?first=1&from_id=1337"}
{"hub" => "https://api.twitch.tv/helix/webhooks/hub",
 "self" => "https://api.twitch.tv/helix/users/follows?first=1&from_id=1337"}
{"hub" => "https://api.twitch.tv/helix/webhooks/hub",
 "self" => "https://api.twitch.tv/helix/users/follows?first=1&from_id=1337"}
{"hub" => "https://api.twitch.tv/helix/webhooks/hub",
 "self" => "https://api.twitch.tv/helix/users/follows?first=1&from_id=1337"}
1 325.74k (  3.07µs) (± 7.74%)  2.16kB/op   2.30× slower
2 317.77k (  3.15µs) (±11.71%)  2.16kB/op   2.36× slower
3 642.53k (  1.56µs) (±14.37%)    832B/op   1.17× slower
4 749.58k (  1.33µs) (± 9.98%)  0.99kB/op        fastest

test.cr

text = %(<https://api.twitch.tv/helix/webhooks/hub>; rel="hub", <https://api.twitch.tv/helix/users/follows?first=1&from_id=1337>; rel="self")

def parse_link_header(header)
  links = {} of String => String
  header.split(",").each do |part|
    parts = part.split(";")
    url = parts[0].gsub(/<(.*)>/, "\\1").strip
    name = parts[1].gsub(/rel="(.*)"/, "\\1").strip
    links[name] = url
  end
  links
end

def parse_link_header2(header)
  header.split(",").each_with_object({} of String => String) do |link, links|
    parts = link.split(";")
    links[parts[1].gsub(/rel="(.*)"/, "\\1").strip] = parts[0].gsub(/<(.*)>/, "\\1").strip
  end
end

def parse_link_header3(header)
  header.split(",").each_with_object({} of String => String) do |link, links|
    %r(<(\S+)>;\s+rel="(\S+)").match(link)
    links[$2] = $1
  end
end

def parse_link_header(header)
  header.scan(/<(?<url>\S+)>;\s+rel=\"(?<name>\S+)\"/).each_with_object({} of String => String) do |link, links|
    links[link["name"]] = link["url"]
  end
end

pp parse_link_header(text)
pp parse_link_header2(text)
pp parse_link_header3(text)
pp parse_link_header4(text)

require "benchmark"

Benchmark.ips do |x|
  x.report("1") { parse_link_header(text) }
  x.report("2") { parse_link_header2(text) }
  x.report("3") { parse_link_header3(text) }
  x.report("4") { parse_link_header4(text) }
end