gliderlabs/alpine + espeak + lame / opus + a golang http server → a text-to-speech server in a ~17 MB Docker image
To run a container from the latest image on Docker Hub:
docker run --name espeakbox -d -p 8080:8080 parente/espeakbox
Install Docker. Clone this repository and then run:
make build
Request:
GET /speech?text=<utterance>
[&pitch=<0,99; default 50>]
[&rate=<80,450; default 175 wpm>]
[&voice=<name; default en>]
[&encoding=<mp3|opus; default mp3>]
Response:
audio/mpeg(mp3) oraudio/ogg(opus) on successtext/plainwith a status code >= 400 on error
Request:
GET /voices
Response:
application/jsonencoding an object with anameslisttext/plainwith a status code >= 400 on error
How well does it perform?
My ten-minute effort into benchmarking a single container yields the following on a boot2docker virtual machine with 2 GB RAM and 8 VCPUs hosted on a Macbook with 16 GB RAM, a 2.7 GHz processor, and 4 cores.
$ ab -c 100 -n 1000 'http://192.168.59.103:8080/speech?text=the%20cheese%20flies%20at%20midnight'
This is ApacheBench, Version 2.3 <$Revision: 1554214 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 192.168.59.103 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software:
Server Hostname: 192.168.59.103
Server Port: 8080
Document Path: /speech?text=the%20cheese%20flies%20at%20midnight
Document Length: 7105 bytes
Concurrency Level: 100
Time taken for tests: 13.102 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 7187000 bytes
HTML transferred: 7105000 bytes
Requests per second: 76.33 [#/sec] (mean)
Time per request: 1310.172 [ms] (mean)
Time per request: 13.102 [ms] (mean, across all concurrent requests)
Transfer rate: 535.70 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 16 112.6 3 1038
Processing: 174 1271 689.6 1089 5861
Waiting: 114 1012 697.3 812 5220
Total: 177 1287 698.4 1093 5864
Percentage of the requests served within a certain time (ms)
50% 1093
66% 1346
75% 1555
80% 1723
90% 2266
95% 2751
98% 3163
99% 3735
100% 5864 (longest request)
The same test on a SoftLayer virtual instance with 16 GB RAM and 8 VCPUs yields the following:
$ ab -c 100 -n 1000 'http://127.0.0.1:8080/speech?text=the%20cheese%20flies%20at%20midnight'
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/
Benchmarking 127.0.0.1 (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests
Server Software:
Server Hostname: 127.0.0.1
Server Port: 8080
Document Path: /speech?text=the%20cheese%20flies%20at%20midnight
Document Length: 7105 bytes
Concurrency Level: 100
Time taken for tests: 11.329 seconds
Complete requests: 1000
Failed requests: 0
Total transferred: 7187000 bytes
HTML transferred: 7105000 bytes
Requests per second: 88.27 [#/sec] (mean)
Time per request: 1132.892 [ms] (mean)
Time per request: 11.329 [ms] (mean, across all concurrent requests)
Transfer rate: 619.53 [Kbytes/sec] received
Connection Times (ms)
min mean[+/-sd] median max
Connect: 0 1 1.5 0 7
Processing: 389 1110 276.9 1068 2494
Waiting: 72 830 226.3 833 1954
Total: 390 1111 276.8 1068 2495
Percentage of the requests served within a certain time (ms)
50% 1068
66% 1230
75% 1301
80% 1344
90% 1465
95% 1606
98% 1721
99% 1793
100% 2495 (longest request)
MIT