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I started typing a reply to explain that "compiling at runtime" does not mean "having a warm-up phase before JIT-compilation", but this: > I cannot be convince

by adwn 1y ago

I started typing a reply to explain that "compiling at runtime" does not mean "having a warm-up phase before JIT-compilation", but this: > I cannot be convinced otherwise. made me think "why bother?". If you insist on being wrong, go on being wrong.

nurettin 1y ago
Well if you insist, this is what makes me think that there is a gradual process of compiling and running native jitted code as the project runs. Hence, runtime. > The scoring process attempts to gauge how well each document matches the user's intent, and as such, depends on the specifics of how each query was phrased. Bing formulates a custom expression for each query and then uses NativeJIT to compile the expression into x64 code that will be run on a large set of candidate documents spread across a cluster of machines. If this is "wrong" to you, then I would like to remain wrong. In fact I would like to have my mental faculties as acutely orthogonally aligned as possible compared to yours in every possible dimension.
- adwn 1y ago
  The difference between Hotspot on one hand and Bing's use of NativeJIT on the other is that after code generation (the "formulates a custom expression" part), the code is immediately JIT-compiled to machine code, while Hotspot would first interpret the generated code for a while and collect execution metrics before it JIT-compiles the code. This delay between code generation and compilation to machine code would be unacceptable for Bing's use case, hence why Java+Hotspot aren't suitable for this task. Hope this clears it up.
  - nurettin 1y ago
    > the code is immediately JIT-compiled to machine code As I said multiple times, we disagree on this point. There is a scoring process during runtime which mirrors what hotspot does in the non-literal sense. And again, I'm ok with being "wrong" so off you go.
    - adwn 1y ago
      The "scoring process" is the generated code, which scores a page's relevance to the user's query. It has absolutely nothing to do with gathering runtime metrics about the generated code, nor with optimizing the performance of the compiled machine code, which is what Hotspot does.

by adwn 1y ago

nurettin 1y ago

Well if you insist, this is what makes me think that there is a gradual process of compiling and running native jitted code as the project runs. Hence, runtime. > The scoring process attempts to gauge how well each document matches the user's intent, and as such, depends on the specifics of how each query was phrased. Bing formulates a custom expression for each query and then uses NativeJIT to compile the expression into x64 code that will be run on a large set of candidate documents spread across a cluster of machines. If this is "wrong" to you, then I would like to remain wrong. In fact I would like to have my mental faculties as acutely orthogonally aligned as possible compared to yours in every possible dimension.

adwn 1y ago
The difference between Hotspot on one hand and Bing's use of NativeJIT on the other is that after code generation (the "formulates a custom expression" part), the code is immediately JIT-compiled to machine code, while Hotspot would first interpret the generated code for a while and collect execution metrics before it JIT-compiles the code. This delay between code generation and compilation to machine code would be unacceptable for Bing's use case, hence why Java+Hotspot aren't suitable for this task. Hope this clears it up.
- nurettin 1y ago
  > the code is immediately JIT-compiled to machine code As I said multiple times, we disagree on this point. There is a scoring process during runtime which mirrors what hotspot does in the non-literal sense. And again, I'm ok with being "wrong" so off you go.
  - adwn 1y ago
    The "scoring process" is the generated code, which scores a page's relevance to the user's query. It has absolutely nothing to do with gathering runtime metrics about the generated code, nor with optimizing the performance of the compiled machine code, which is what Hotspot does.