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⚡ Optimize JSON serialization in simple_seismic_server - #183
Igor Holt (igor-holt) wants to merge 2 commits into
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Replaces indent=2 with separators=(',', ':') to eliminate unnecessary whitespace during JSON generation, decreasing CPU serialization time and minimizing the HTTP response payload size. Additionally ensures robust character encoding by explicitly passing utf-8 to encode() and the Content-Type header.
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Code Review
This pull request updates the send_json method in simple_seismic_server.py to explicitly set the charset to UTF-8 in the Content-Type header and encode the JSON payload. The review feedback recommends removing the redundant charset parameter from the application/json header to comply with RFC 8259, and suggests setting ensure_ascii=False in json.dumps to optimize the serialization of non-ASCII characters.
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| def send_json(self, data): | ||
| self.send_response(200) | ||
| self.send_header('Content-Type', 'application/json') | ||
| self.send_header('Content-Type', 'application/json; charset=utf-8') |
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According to RFC 8259 Section 11, no charset parameter is defined for the application/json media type. Compliant JSON is implicitly UTF-8. Adding charset=utf-8 is redundant and technically non-standard, and some strict clients might reject or misinterpret it. It is recommended to keep the header as application/json.
| self.send_header('Content-Type', 'application/json; charset=utf-8') | |
| self.send_header('Content-Type', 'application/json') |
| self.send_header('Access-Control-Allow-Origin', '*') | ||
| self.end_headers() | ||
| self.wfile.write(json.dumps(data, separators=(',', ':')).encode()) | ||
| self.wfile.write(json.dumps(data, separators=(',', ':')).encode('utf-8')) |
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By default, json.dumps has ensure_ascii=True, which serializes non-ASCII characters into Unicode escape sequences (e.g., \uXXXX). Since the response is encoded in UTF-8, setting ensure_ascii=False allows non-ASCII characters to be written directly as UTF-8 bytes. This reduces the serialized payload size and improves serialization performance, aligning with the goal of optimizing JSON serialization.
| self.wfile.write(json.dumps(data, separators=(',', ':')).encode('utf-8')) | |
| self.wfile.write(json.dumps(data, separators=(',', ':'), ensure_ascii=False).encode('utf-8')) |
Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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Superseded by #194 (same JSON serialization optimization). Closing duplicate to reduce babysit noise. |
Understood. Acknowledging that this work is now obsolete and stopping work on this task. |
💡 What:
Removed
indent=2fromjson.dumps()insimple_seismic_server.pyand replaced it withseparators=(',', ':'). Added explicit.encode('utf-8')andcharset=utf-8to the HTTPContent-Typeheader.🎯 Why:
The default
indent=2adds significant unnecessary whitespace to every JSON response. This wastes CPU cycles during string serialization and increases the total network bandwidth required to send the payload. Using compact separators generates the smallest possible JSON string, which is ideal for a high-throughput production API. Explicitly defining UTF-8 encoding ensures robust compliance with HTTP standards.📊 Measured Improvement:
Using a multi-threaded
urllibbenchmarker targeting the/api/healthendpoint:/api/seismic/status) will see even greater reductions in response size and transmission time.PR created automatically by Jules for task 12150969622136327482 started by Igor Holt (@igor-holt)