Nginx throughput capacity drops

[feiniao886]

Thank you for providing this tool！
Already used in production environment。
Use it to process gzip body data。
But the processing speed drops by 60% after enabling。
Close the decompression program, processing capacity 600MB/S,but after turning it on, 200MB/S。
Do you have good suggestions and ways？
This is lua code：
ngx.ctx.max_chunk_size = tonumber(ngx.var.max_chunk_size) #：10kb
ngx.ctx.max_body_size = tonumber(ngx.var.max_body_size) #：1M

function inflate_chunk (stream, chunk)
return stream(chunk)
end

function inflate_body (data)
local stream = require("zlib").inflate()
local buffer = ""
local chunk = ""

for index = 0, data:len(), ngx.ctx.max_chunk_size do
chunk = string.sub(data, index, index + ngx.ctx.max_chunk_size - 1)
local status, output, eof, bytes_in, bytes_out = pcall(stream, chunk)
buffer = buffer .. output
end

return buffer
end

local content_encoding = ngx.req.get_headers()["Content-Encoding"]
if content_encoding == "gzip" then
ngx.req.read_body()
local data = ngx.req.get_body_data()

if data ~= nil then
local new_data = inflate_body(data)
ngx.req.set_body_data(new_data)
end
end

[brimworks]

Are you measuring processing capacity in MB/S before deflation or after? How is the CPU before/after deflation? How does this compare to mod_deflate? https://www.webperformance.com/library/reports/moddeflate/