IsapiScale

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make web server Delphi apps scalable

IsapiScale 최신버젼 다운로드

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# IsapiScale
a pair of hints to make Delphi isapi web app scalable and reliable 
 
of course Delphi has the safe memory as Rust, the OOP quicker and elegant than C++ thanks to an optimized VMT, faster execution time due to smaller pe size that fit into L1 cpu cache 
 
so for newbies there it is a sample to make Windows Server isapi applications flying 
 
1. using a scalable allocator (see mine repositories) 
2. set keep-alive 
3. set max connections higher 
4. don't use globally unique firedac elements also saving time to recreate connections and queries, so: 
5. manage easy threadvar for database objects 
6. use database pooling 
7. let me suggest a fastest json parser https://github.com/ahausladen/JsonDataObjects and use type casting instead of variants*: 
no jealousy towards techempower's c++ frameworks 🙂 
 
a test with D12.3 and i9900 cpu within windows server 2025, push the number of messages with sql query from 750 to 5000 for sec (MySQL 8.4.5** LTS) 
(ab -n 10000 -c 1000 -k http://address/isapiscale.dll/scale) with 1000 concurrent users 
document path: /isapi/isapiscale.dll/scale 
document length: 2425 bytes 
concurrency level: 1000 
time taken for tests: 1.968 seconds 
Complete requests: 10000 
failed requests: 0 
keep-alive requests: 10000 
total transferred: 25950000 bytes 
HTML transferred: 24250000 bytes 
requests per second: 5081.92*** [#/sec] (mean) 
(ubuntu 25.04 same vm and mysql config -> apache mod ~2500 reqs/s) 
time per request: 196.776 [ms] (mean) 
time per request: 0.197 [ms] (mean, across all concurrent requests) 
transfer rate: 12878.49 [Kbytes/sec] received 
 
this should increment linearly among all the cpu cores 
 
* cast the type eg. Obj.S['one'] := 'thisisastring' Obj.I['two'] := 2 
(string, integer, float, etc.) 
** as client libs use libmysql.dll, libssl-3-x64.dll, libcrypto-3-x64.dll 
*** identical score among MSHeap and RDPMM64 (tbbmalloc) allocators 
btw. using mysql sample database world 
 
let me know opinions or errors, kind regards 
rdp@dellapasqua.com 
Roberto

IsapiScale

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